UNIT -I : Chemical Substances : Nature and Behaviour Chapter Acids, Bases and Salts ...

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UNIT -I : Chemical Substances : Nature and
                              Behaviour
             Chapter - 1 : Chemical Reactions and Equations
Flowcharts

             i

                 silver

                                                              qq

                 Chapter - 2 : Acids, Bases and Salts
Flowcharts
2]                                                     Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

                  Physical Properties                                        Physical Properties
                        Of Acids                                                    Of Bases
               (i) Sour in taste                                          (i) Bitter in taste
               (ii) Turns blue litmus red                                 (ii) Turns red litmus blue
                              +                                                             –
               (iii) Give H ions in                                       (iii) Give OH ions in
                     aqueous solution                                           aqueous solution
               (iv) Aqueous solution                                      (iv) Does not conduct
                     conducts electricity                                       electricity
                                                    ACIDS
                                                      and
                                                     BASES

                 Chemical Properties                                        Chemical Properties
                         Of Acids                                                   Of Bases
               (i) React with metals to                                   (i) Alkali (Soluble bases)
                    liberate hydrogen                                          react with metals to
               (ii) React with metal                                           liberate H2.
                    carbonate to liberate                                 (ii) Bases react with
                    CO2                                                        acidic oxides to form
                                                                               salts.

                                                   SALTS
                                              Formed when an
                                            acid and a base react
                                               with each other

                                             TYPES OF SALTS

                                                                                     Plaster of Paris
             Common salt
                                                                                     CaSO4.½H2O
                NaCl                         PREPARATIONS                                 373 K
      NaOH + HCl        NaCl + H2O                                        CaSO4.2H2O              CaSO4.½H2O
                                                                                                     + 1½H2O

               Bleaching powder                                              Washing soda
                    CaOCl2                                                   Na2CO3 .10H2O
       Ca(OH)2 + Cl2        CaOCl2 + H2O                            Na2CO3+10H2O         Na2CO310H2O

                                                Baking Soda
                                                 NaHCO3
                               Na2CO3(aq) + CO2(g) + H2O(l)         2NaHCO3(s)

                                                                                                               qq
Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X                                                   [3

                        Chapter - 3 : Metals and non-metals
Flowcharts
                                                   ELEMENTS

                          METALS                                        NON-METALS

                       Physical Properties                               Physical Properties
            (i) They are solids.                              (i) They are found in solid, liquid and
            (ii) They have high M.P. and B.P.                       gaseous form.
            (iii) They have high density.                     (ii) They have low M.P. and B.P.
            (iv) They are malleable and ductile.              (iii) They are not malleable and ductile.
            (v) They are good conductor of heat               (iv) They are poor conductor of heat &
                  & electricity.                                    electricity.

                                                                         Chemical Properties
                      Chemical Properties                     (i) Non-metal + O2 → Non-metal
            (i) Metal + O2 → Metal oxide                           oxide
            (ii) Metal + H2O → Metal hydroxide               (ii) Non-metal + steam → H2
            (iii) Metal + dil acid → Salt + H2               (iii) Non-metal + acid → No reaction
            (iv) Metal + Cl2 → Metal chloride                (iv) Non-metal + Cl2 → Non-metal
            (v) Metal + H2 → Metal hydride                         chloride

                                                                                                          qq
4]                                                                Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

               Chapter - 4 : Carbon and its compounds

Flowchart
                                                Classification of Hydrocarbons

                          Aliphatic or open chain                                    Cyclic or closed chain
                              hydrocarbons                                              hydrocarbons

               Saturated                           Unsaturated                      Alicyclic            Aromatic
             hydrocarbons                         hydrocarbons                    hydrocarbons         hydrocarbons
          (Hydrocarbons having                (Hydrocarbons having
             Single bonds)                       Multiple bonds)

                  Alkanes                      Alkenes           Alkynes

                                                                                                                               qq

       Chapter - 5 : Periodic Classification of Elements

Flowcharts
               Arranged with                                                               Arranged with increasing atomic
             increasing mass                    Classification of elements                 number

             Group of three
             elements having                                                                                        113
                                               upto Ca out of 56              63    Arranged with
             similar properties.               elements                    elements increasing atomic mass          elements

      Dobereiner's      Limitations led        Newland's          Modified      Mendeleev's        Research       Modern
         Triad          to                      Octave            further                          led to
                                                                                 Periodic                         Periodic
                                                                                  Table                            Table

               Main                                    Main                              Main                   Main
             Features                                Features                          Features               Features

      Atomic mass of                        Every eighth                     Elements arranged          Elements arranged
      middle element is                      element has                      in vertical groups          on the basis of
      arithmetic mean                     properties similar                    and horizontal              electronic
          of atomic                       to that of the first                     periods               configuration into
      mass of other two                                                                                      4 groups
                                                                                                                 .

                                                                                                                               qq
Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X                                            [5

                                           UNIT -II : World of Living

                               Chapter - 6 : Life Processes

Flowcharts
                                   PATHWAY OF AIR ENTERING THROUGH
                                         RESPIRATORY SYSTEM

                 Nostril                         Nasal Passage                           Pharynx

                 Lungs                               Trachea                             Larynx

                 Bronchi                           Bronchioles                           Alveoli

                                 BODY PARTS IN ALIMENTARY CANAL AND
                                   THEIR SECRETIONS FOR DIGESTION
                                                 Mouth (Saliva)

                                           Salivary amylase or ptyalin

                                                     Pharynx

                                                  Oesophagus

                                                    Stomach

                                 Hydrochloric acid, Gastric juice, Mucus, Pepsin

                                                    Pancreas

                             Pancreatic juice (Pancreatic amylase), Bile juice (Liver)

                                                 Small Intestine

                                                 Intestinal Juice

                                                 Large Intestine

                                                      Anus
6]                                                             Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

                                    VARIOUS STEPS INVOLVED IN THE PROCESS
                                                OF NUTRITION
                                                        Ingestion

                                                    Taking in of food

                                                        Digestion

                      Complex food molecules are converted into simpler food molecules

                                                       Absorption

                              The simple soluble food is absorbed by blood through diffusion

                                                       Assimilation

               Cells absorbed food through blood for its growth and repair of the body

                                                        Egestion

                Undigested material is moved to the surface of the cell and thrown out

                                        DIFFERENT WAYS IN WHICH GLUCOSE IS
                                            OXIDISED TO PROVIDE ENERGY
             Glucose
               In cytoplasm

                                              Absence of oxygen       Ethanol + Carbon dioxide + Energy
                                                   (In yeast)         (2 carbon molecules)

             Pyruvate                       Lack of Oxygen            Lactic acid + Energy
                                             (Muscle cells)           (3 carbon molecules)

                                             Presence of oxygen
                                                                      Carbon dioxide + Water + Energy
                                               (In mitochondria)

                                       ORGANS INVOLVED IN EXCRETION IN
                                         HUMAN BEINGS AND FUNCTION
                                           Bowman's capsule and glomerulus

                                         Filter the blood passing through them

                                                Tubular part of nephron

      Reabsorb some substances like glucose, amino acids, salts and a major amount of water

                                                     Collecting duct

                                    Collect urine from nephrons and joins the ureter

                                                          Ureter

                               Collect urine from kidney and pass it on to urinary bladder

                                                     Urinary bladder
Collecting duct

                                      Collect urine from nephrons and joins the ureter

Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X                                                             [7
                                                              Ureter

                                 Collect urine from kidney and pass it on to urinary bladder

                                                        Urinary bladder

                   Store urine until the pressure of expanded bladder leads to the urge to pass it out

                                                              Urethra

                                               Excrete out urine from the body

                                                                                                                    qq

                        Chapter - 7 : Control and Co-Ordination

Flowcharts

                                                HUMAN NERVOUS SYSTEM

                Central Nervous System            Peripheral Nervous System          Autonomic Nervous System
                         (CNS)                               (PNS)                            (ANS)

                                               Cranial nerves     Spinal nerves   Sympathetic     Parasympathetic
                  Brain         Spinal Cord
                                                 (12 pairs)        (31 pairs)

            Forebrain          Mid brain         Hind brain

       Cerebrum         Olfactory lobes    Cerebellum   Pons     Medulla Oblongata

       1.   Occipital lobe
       2.   Temporal lobe
       3.   Frontal lobe
       4.   Parietal lobe
8]                                                                  Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

                     PLANT MOVEMENT IN RESPONSE TO EXTERNAL STIMULUS

                                              Directional or Tropic Movement

             Phototropism                    Geotropism                    Hydrotropism                   Chemotropism
        (In response to light)         (In response to gravity)       (In response to water)       (In response to chemicals)

        Shoots show positive               Roots show positive               Water plants         Growth of pollen tube towards
           phototropism                       geotropism                                          a chemical produced by ovule

                                                                  GLANDS

                                             Exocrine Glands                  Endocrine Glands
                                               (with ducts)                      (ductless)

            Pituitary Gland Thyroid Gland Parathyroid               Thymus       Adrenal Pancreas          Gonads

        1. Growth hormone           Thyroxine       Parathyroid Thymosin 1. Adrenalin
        2. Trophic hormone          hormone         hormone              2. Cortisol                 Testes        Ovaries
           Prolactin hormone                        (PTH)
           Vasopressin
           Oxytocin                                                                               Testosterone 1. Oestrogen
                                                                                                               2. Progesterone
                                                                                            1. Insulin
                                                                                            2. Glucagon
                                                                                                                                  qq

                 Chapter - 8 : How Do Organisms Reproduce ?
Flowchart
                                                        Types of Reproduction

      Sexual Reproduction                                                                  Asexual Reproduction

        Examples of              Binary            Multiple                      Spore
                                                                                                    Rejuvenation     Fragmentation
        organisms                fission           fission                     formation
         Cat                                                                                 Vegetative
                                                                   Budding
         Mouse                                                                              Propagation               Examples of
         Bird                                                                                                         organisms
         Fish             Examples of           Examples                     Examples of             Examples of       Spirogyra
         Lizard           organisms             Plasmodium                   organisms               organisms       Regeneration
         Cockroach          Bacteria                                         Mould                    Starfish
         Frog               Amoeba                                           Fern                     Flatworm
                            Paramecium                                       Moss                                     Examples of
                                                                             Mushroom                                  organisms
                            Algae
                                                                                                                       Planaria
                                                                 Examples of                Examples of                Hydra
                                                                 organisms                  organisms
                                                                  Yeast                      Bryophyllum
                                                                  Hydra                      Rose plant
Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X                                                                                                           [9
                                                                                                          Budding
                                                                                                                    yeast

               Bisexual Flower
                                                                                                          Fragmentation
                                                                                      Asexual                        Spirogyra
               Unisexual         Structure of a Flower                              Reproduction
               Flower
                                                                                                           Spores
                                                                                                                     moulds
                                                                                                                            Natural Potato,
                Insect Pollination                                                                        Vegetative                     ginger
                                                                Reproduction
                                                                                                          Propagation
                 Wind             Pollination                     in Plants
                                                     Sexual                                                                                Cutting
                 Pollination                         Reproduction                                                           Artificial       Sugar cane
                                                                                                                                           Grafting Fruit
                                                                   Stigma            Mature Flower
                  Seed Formation                                                                                                                       plants
                                                                  Style
                  Fruit                                      Filament                                                                       Layering
                                      Seeds
                  Formation                                                                                 Connective                      jasmine
                                                           Ovule
                  Dispersal of                                      Perianth                                                               Tissue Culture
                                                                    Petal:Corolla
                  Seeds                                             Septal:Calyx                                                            orchids
                  Seeds                                                                                               Anther
                  Germination                                                                                  Microsporangium
                                                                                            Floral axis
                                                               Ovary                       Articulation
                                                                        Nectary                              Stamen
                                                                                          Pedicel

                                         Examples of Sexual and Asexual Reproduction in Plants

                                                               Types of Pollination

                              1. Self pollination : pollen          2. Self pollination : pollen            3. Cross pollination :
                                from the same flower                   from same plant but                     pollen from flower
           Self Pollination :                                          different flower                        of a different plant         Cross Pollination :
                                                     1
           Pollen is                                                                                                                        Pollen is
           transferred to the                                  2                     3                                                      transferred to
           stigma of same                                                                                                                   flowers of other
           flower or flowers                                                                                                                plants of the same
           borne to same                                                                                                                    species.
           plant.

                                      Organ                                                                           Function
                        Testis with seminiferous                                                               Sperm production
                                 tubules
                           Collecting ducts                                                                  Transport and storage
                                                                                                          Transport, maturation and
                                     Epididymis
                                                                                                                ejaculation
                           Vas deferens(sperm                                                               Transport and ejaculation
                                  duct)

                               Seminal vesicles                                                               Secrete thick liquid to
                                                                                         urine                  transport sperm

                                                                                                             Secretes thin alkaline
                                 Prostate gland                                                               solution to neutralise
                                                                                                            urine and female system
                                                                                                            Secretions may lubricate,
                                 Cowper's gland                                                             flush out urine or form a
                                                                                                                 gelatinous plug

                                      Urethra                                                                Passage for urine and
                                                                                                                   sperm

                                       Penis                                                                          Copulation

                                                 Male Reproductive organs and their functions
10 ]                                                                   Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X
                                             Reproduction of Species To Avoid Extinction

                                      Asexual Reproduction                     Sexual Reproduction

                                1. One Parent                                           1. Two Parents
                                                                      1. Produce
                                2. Fast                                                 2. Slow
                                                                         Offspring
                                3. No Genetic Variety                                   3. Genetic Variety
                                   -if one clone gets sick,
                                   all the clones get sick            2. Use DNA

                                                                      3. Grow and
                                                                         Develop

                                 FEMALE REPRODUCTIVE CYCLE

                                                                                                    Estrogen and
         Anterior pituitary                          Start of another cycle                         progesterone
                                                                                                      levels fall

            Releases

               FSH                 Causes
                                                                                                LH and FSH secretion
              Causes

                                                                                                      Stops
          Primary follicle

                                                                                                   Reaches peak
          To mature into                                                                     at the end of 28 day clock

         Secondary follicle      To mature        Graafian follicle
                                    into

             Produces                              Produces
                                                                                     Estrogen and           Maintains         Endometrium
                                                                                     progesterone
             Estrogen           Causes              Estrogen

                                                                                      Produces
                                                                                                                          Corpus luteum
              Causes

           Anterior pituitary                          LH                        Ovulation
                                  To release                          Causes                         Produces
                                                                                 (day 14)
                                                                                                                              Ovum

                                                                                                                                            qq

                       Chapter - 9 : Heredity and Evolution

Flowcharts

                                         /Round
/Round

Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X                                                       [ 11

                                   Experiment
                                 Question : When peas with two different traits –round and
                                 wrinkled seeds–are crossed, will their progeny exhibit one of
                                 those traits, both of those traits, or a '' blended'' intermediate trait?
                                                         Stigma
                                  Anthers
                                                                            1 To cross different varieties
                                                                                of peas, remove the
                                                                                anthers from flowers to
                                                                                prevent self-fertilization.

                                                                  Flower
                                                     X
                                     Flower                                   2 ...and dust the stigma
                                                                                   with pollen from a
                                                  Cross                            different plant.

                                                                               3 The pollen fertilizes ova
                                                                                   within the flower, which
                                                                                   develop into seeds.

                     Methods                                                  4     The seeds grow
                                                                                    into plants

                                  P generation     Homozygous          Homozygous
                                                   round seeds        wrinkled seeds

                                                                  X
                                                                              5      Mendel crossed
                                                                                    two homozygous
                                                              Cross                 varieties of peas.

                                  F1 generation                                 6 All the F1 seeds
                                                                                    were round.
                                                                  X                 Mendel allowed
                                                                                    plants grown
                                                               Self-                from these seeds
                                                           fertilization            to self-fertilize.

                                  F2 generation                Fraction of
                                                               progeny seeds

                                  5474 round seeds              3/4 round          3/4 of F2 seeds were
                                                                                   round and 1/4 were
                                                                                   wrinkled. a 3:1 ratio.
                      Results     1850 wrinkled seeds          1/4 wrinkled

                                  Conclusion : The traits of the parent plants do not blend.
                                  Although F1 plants display the phenotype of one parent, both traits
                                  are passed to F2 progeny in a 3:1 ratio.

                            Pictorial Representation of Mendel's Monohybrid Cross
12 ]                                                                                   Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

                                                                       HEREDITY

                                                      governed by                 Mendel's Law
                                                                             d
                                                                          die     Stu
                                                                       stu           die
                                                                 del                     d
                                                           M  en

                                  Monohybrid Cross Pea with
                                    Red and White flower                                Dihybrid Cross

                                   g                                                                                          to
               Phenotype        ris ives                   produced                              produced
                                                                                                                 r      ise           Round Yellow
                (All red)          e                                                                          es
                                     to                                                                    giv                           RRYY
                                                                                   Parental Generation
                                              F1 Generation
                                                                                            P1
                Genotype               d                                                                      an                     Wrinkled Green
                (Hybrid)          an                                                                             d
                                                                                                                                          rr yy
                                                          produced by                            produces
                                  giv                     self polinatoin
                Phenotype       ris es                                                                                             Parental combination
              3 red : 1 white      e                                                                                by
                                                                                                                med                       RYry
                                                                                                            for
                                              F2 Generation                             F1 Generation
                                                                                         (Dihybrids)
               Genotype           and                                                                           an                   Recombinations
                                                                                  lead to                           d                    rY,Ry
             1RR : 2Rr : 1rr
                                                                        Variation in             produces
                                                                         species                                            t o
                                                                                                                 r      ise            Phenotype
              Morphological                                                                                   es
                                                                                                           giv                         9:3:3:1
                evidence
                                                                                        F2 Generation
                                                                                                            an
                                                                                                                d
               Anatomical                                                                                                             Genotype
                evidence                                         Darwin's theory of                                             1:2:2:4:2:2:1:1:1:1
                                                  Supported          evolution
                                                     by
                 Vestigial
                structures

            Palaeontological
               evidence

                                                                                                                                                                    qq

                                                       UNIT -III : Natural Phenomena

                  Chapter - 10 : Light-Reflection and Refraction

Flowchart
                                                                                        LIGHT

          Torches and
           Headlights                                                                        related phenomenon can be
                                                                                                     studied with                                       Simple
                                                                                                                                                      microscope
          Flood lights

          Reflector for                                                                                                                               Compound
         projector lamps                                                                                                                              microscope
                                                            Mirrors                                       Lenses
                                           uses                                                                                      uses
                                                                types                                 types                                          Telescope
         Solar devices
         and furnaces                                                                                                                                  Camera
                                                                                                                                                     spectrometer
                                           Converging or               Diverging or           Concave/                   Convex /
            Shaving                                                                           Diverging                 converging
                                             concave                     convex
            mirrors                                                                                                                                Spectacles
          and Dentists'
             mirror
                                                      position of object

         At infinity      Between infinity            At C                       Between                 At F                   Between pole
                              and C                                              F and C                                           and F
and furnaces                                                                                                                  Camera
                                                                                                                                      spectrometer
                                          Converging or           Diverging or       Concave/             Convex /
            Shaving                                                                  Diverging           converging
                                            concave                 convex
            mirrors                                                                                                                   Spectacles
          and Dentists'
             mirror
Oswaal CBSE Chapterwise Quick Review,position
                                      SCIENCE,    Class-X
                                              of object
                                                                                                                                                     [ 13

         At infinity        Between infinity            At C            Between                 At F           Between pole
                                and C                                   F and C                                   and F
                image                                      image                                   image
                                     image                                   image                                        image

          At focus               Between                At C            Beyond C           At infinity           Behind the
                                 F and C                                                                           mirror

                                                                                                   Position of object

                   At infinity       Beyond 2F1                At 2F1       Between F1             At F1           Between F1
                                                                             and 2F1                                 and O
                image            image
                                                                         image                                 image

                        At F2         Between                  At 2F2       Beyond 2F2           At infinity       On the same side of
                                     F2 and 2F2                                                                     lens as the object

                                                                                                                Lens functioning in
                                         corrected by                                                             human beings
          Concave                                                                Myopia
            lens

                                         corrected by
          Convex                                                        Hypermetropia                                             Human eye
                                                                                                               Problems
           lens

                                          corrected by
         Bifocal lens                                                       Presbyopia

                                                                                                                                                     qq

               Chapter - 11 : Human Eye and Colourful World
Flowchart
                                                          STRUCTURE OF EYE

                       ORGANS                                                                     FUNCTIONS

              1. Cornea                             It provides the refraction for light rays entering the eye.

              2. Iris                               It controls the size of the pupil.

              3. Pupil                              It controls the amount of light entering into the eyes.

              4. Ciliary muscles                    It helps in regulating the size of pupil.

              5. Eye lens                           It focus incoming light rays on the retina.

              6. Retina                             It helps in the formation of image on it.

              7. Aqueous Humour                     It provides nutrition to the eye tissues.

              8. Vitreous Humous                    It helps to keep retina in place by pressing it against the choroid.

                                                                                                                                                     qq
14 ]                                                           Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

                                               UNIT -IV : Effects of Current

                                         Chapter - 12 : Electricity

Flowcharts
                                                    ELECTRICITY

                                                   ELECTRIC POWER
                                                           p=w/t 2
                                                                  V
                                                    Or VI = I2R =
                                                                  R
                                                    Unit of Power - Watt

              ELECTRIC ENERGY                                                               P. D = work done /
                 Work = VIT = I2RT                                                                  charge
               Unit of Energy – Watt-                                                             V = W/Q
                     Hr or kWh                                                                 Unit of V is Volt
                1kWhr = 3.6 × 106 J

                 JOULE'S LAW                                                                    OHM'S LAW
                H = I2RT or H = VIT                   ELECTRICITY                                    V = IR
            Unit of heat energy - Joules                                                        Unit of R - Ohm

                RESISTANCE IN
                   SERIES                                                                      RESISTANCE =
               RS = R1 + R2 + R3 .....                                                            PD/current
                                                                                                   R = V/I
                RESISTANCE IN
                  PARALLEL
           1/RS = 1/R1 + 1/R2 + 1/R3 .....         RESISTIVITY = RA / L
                                                         Unit of Resistivity –
                                                               Ohm-m

                                   SYMBOLS USED IN ELECTRIC CIRCUIT

     Electric cell                              Battery                                  Key                   Or

    Wire crossing                                                                        Variable
                                                  Bulb
                                                                                        resistance

  Resistance                                   Rheostat                                  Ammeter                    A

                 Voltmeter                 V                                AC Source
Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X                                            [ 15

                                                                                                   qq

           Chapter - 13 : Magnetic Effects Of Electric Current

Flowcharts

                                 MAGNETIC EFFECTS OF ELECTRIC CURRENT

                                                       Safety measure
                                                Fuse              Earth
                                                wire

                            Domestic                                      Magnet and its
                            electric circuits                             properties

                                                       MAGNETIC             Magnetic field lines
                   Fleming right hand rule.
                                                       EFFECT OF            & properties
                  Electromagnetic induction.
                                                       ELECTRIC             Right hand thumb
                          Generator
                                                        CURRENT             rule

                            Fleming left hand
                            rule                                          Solenoid
                            Electric motor         Electromagnet
16 ]                                                         Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

                                                ELECTRIC CURRENT

                      Alternating                                                      Direct Current
                       Current

                                                                                       DC Generator
                   A. C. Generator

                                                                                        Sources of DC
                     Sources of AC                                             (i) Electrochemical dry cell
             (i) Thermal Power stations                                        (ii) Solar cells
             (ii)Car alternators                                               (iii) Lead acid accumulator
                                                                                     batteries

                                                                                                                qq

                                          UNIT -V : Natural Resources
                       Chapter - 14 : Sources of Energy
Flowcharts
                                     NON-RENEWABLE ENERGY

                                               FOSSIL FUELS

                 COAL                PETROLEUM                    COKE                  NATURAL GAS

                                            P R O D U CT I O N S

              Remains of plants           Remains of plants        Destructive         Gas evolved when
              and animals got             & animals buried         distillation of     remains of plants &
              buried inside the           beneath earth into       coal.               animals buried into
              earth millons of            sea or porous                                porous rocks
              years ago.                  rocks beneath                                beneath the earth.
                                          earth.

                                                     USES

         (i) Used as a fuel in       (i) Used as a fuel for     (i) Reducing agent      (i) Used as CNG
             ther mal power              vehicles.                  in metallurgical        in transpor t
             plants to generate      (ii)Used           as          processes.              vehicle.
             electricity.                industrial fuel in     (ii)Used for making     (ii)U s e d a s a
         (ii)F o r h e a t i n g         the form of LPG.           bio gas.                source      of
             purposes in                                                                    carbon in the
             homes.                                                                         industry.
Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X                                                                        [ 17
                                                 SOURCES OF ENERTGY

                                                             ENERGY

                    Renewable                                                                  Non-Renewable
                 (Non-conventional)                                                            (Conventional)

                                                                           Thermal                Coal
                     Wind                  Windmill                        Power plant            Petroleum
                     Water                 Hydropower plant

                     Biomass               Biogas

                     Solar                 Solar Appliances

                     Nuclear               Nuclear power plant

                     Geothermal            Energy resources

                                       ALTERNATE SOURCES OF ENERGY

                                                           SOURCES

      SUN                    WIND      WATER          DEAD AND                   SEA           EARTH       NUCLEUS OF ATOM
                                                    DECAY MATTER

     SOLAR               WIND         HYDRO                 BIO            TIDAL ENERGY        GEOTHERMAL          NUCLEAR
    ENERGY              ENERGY        ENERGY              ENERGY           WAVE ENERGY           ENERGY            ENERGY
                                                                          OCEAN THERMAL
                                                                              ENERGY

 (i) Solar cooker     (i) Wind mill     (i) Hydro-         (i) Biogas       (i) Surface         (i) Electric      (i) Nuclear
 (ii) Solar Cell      (ii) Wind genera-     electricity    (ii) Biomass           followers          generators         reactors
 (iii) Solar Panel          tor             power plant                     (ii) Oscillating    (ii) Steam        (ii) Dynamite
 (iv) Solar water     (iii) Wind Energy                                           water              turbines     (iii) Nuclear
       heater               farms                                                 columns                               Power
 (v) Solar power      (iv) Wind Power                                       (iii) Focussing                             plant
                            in India                                              devices
                                                                            (iv) Ocean
                                                                                  Thermal
                                                                                  energy
                                                                                  conversion
                                                                                  power
                                                                                  plant

                                                                                                                               qq
18 ]                                      Oswaal CBSE Chapterwise Quick Review, SCIENCE, Class-X

                           Chapter - 15 : Our Environment

Flowchart
                                       ENVIRONMENT

         ABIOTIC FACTORS                                                  BIOTIC FACTORS

          1. Temperature                                                  1. Plants
          2. Pressure                                                     2. Animals
          3. Humidity                                                     3. Human beings
          4. Rainfall
          5. Sunlight
          6. Wind

                                      TROPHIC LEVELS

          PRODUCERS                                                        CONSUMERS

             Plants                                                         Herbivores
                                                                            Carnivores
                                                                           Decomposers

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