Amazing Science experiments all from home!!
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Amazing Science
experiments all from
home!!
1
Contents
Cool Pressure trick ............................................................................................3
How to make a homemade Lava lamp................................................... 4
How to turn milk into stone ..........................................................................5
Giant Hand in hot ice ..................................................................................... 6
Grow your own crystals ................................................................................... 7
Rainbow in glass ............................................................................................... 8
2
Cool Pressure trick
Equipment needed:
Straw
Glass bottle
Glass bowl
Putty
Glove
Coloured food colouring
Method
1. Role the putty into a flat line
2. Then wrap it tightly around
one end of the straw.
3. Next fill up the glass bowl with cold water and add the food
colouring.
4. Boil the kettle and fill the bottle to the neck with hot water
(be careful when pouring)
5. Once the bottle has filled up wait 20
seconds then empty it back out using
your glove to hold the bottle
6. Quickly place the straw in the bottle
and fix it tight with the putty
7. Now flip over the bottle so the other end
is submerged in the bowl and watch
what happens.
The science behind:
This trick works because:
The bottle works as a vacuum and a pressure gradient is created. When
the opening in the bottle comes in contact with another substance it is
drawn in to equalizes the pressure.
3
How to make a homemade Lava lamp
Equipment needed:
Flask or bottle
Vegetable oil and water
Your choice of food colouring
Alka-Seltzer
Method
1. Fill the flask ¾ of the way with vegetable oil.
2. Fill the rest of the flask with water. The water will
sink to the bottom.
3. Add a few drops of food colouring; your choice of
colour. The food colouring is water-based, so it will
sink and colour the water that is now at the
bottom of the flask.
4. Break an Alka-Seltzer tablet into a few small
pieces, and then drop them in the flask one at a
time.
5. Watch your lava lamp erupt into activity! As the reaction slows
down, simply add more Alka-Seltzer.
The science behind:
A lava lamp works because of two different scientific principles, density and polarity.
1. Density is the measurement of how compact a substance is i.e. how much of it
fits in a certain amount of space. If you measure an equal volume of oil and
water, you'll find that the water is heavier than the same amount of oil because
water is denser than oil. So it will sink to the bottom when the two are put in the
same container.
2. Without polarity water molecules would eventually mix together. Water
molecules are "polar" because they have an opposite electrical charge that
attracts other atoms. Oil molecules, however, are non-polar— they don't have a
positive or negative charge, so they are not attracted to the water molecules at
all. This is why oil and water don't mix!
4
How to turn milk into stone
Equipment needed:
1 1/2 cups of skimmed milk
A microwaveable mixing bowl
4 teaspoons of vinegar
A microwave or an hob
Biscuit cutters and strainer
Method
1. Heat one and a half cups of skimmed milk until steaming hot
on stove or in microwave for 2 minutes
2. Add 3-4 teaspoons of vinegar to the milk
3. Stir the mixture slowly with spoon until the mixture starts to
form lumps.
4. Set it aside to cool down.
5. Use the spoon to scoop out the solid and place onto paper
towels.
6. Fold the paper towels over the mixture, to
soak up the liquid.
7. Roll the mixture out and then place in a
container or cut out shapes and press down
until set out evenly.
8. Leave overnight.
9. Once set try and break the solid milk.
The science behind:
The milk actually turns into plastic. Milk contains many
molecules of a protein called casein. When milk is heated and
combined with an acid, such as vinegar, the casein molecules
unfold and reorganize into a long chain.
5
Giant Hand in hot ice
Equipment needed:
Large Jar (big enough for a
hand)
Liquid sodium acetate(add
vinegar to bicarbonate of
soda)
Powdered sodium acetate
(Bicarbonate of soda)
Method
1. Add the liquefied sodium acetate to the jar.
2. Put some powdered sodium acetate on your hand and fingers
3. Place your hand into the jar
4. Watch and feel your hand get thicker
5. The ‘ice’ will have a creamy feel so simply break it off to
release your hand
The science behind:
This trick works because:
Hot ice is created using sodium acetate, which is a salt created
from the reaction between sodium bicarbonate, or baking
soda, and acetic acid, or vinegar. When a reaction with acid
occurs, sodium acetate appears 6to freeze like ‘ice’ as the cold
solution turns from liquid to solid.
Grow your own crystals
Equipment needed:
3 cups of sugar
1 cup of water
Paper clip and Pencil
String
Food colouring(Colour
optional)
Saucepan and long glass
Method
1. Heat the 3 cups of sugar and 1 cup of water in the saucepan
and stir till all/most of the sugar is dissolved
2. When dissolved remove off the heat and the add food
colouring. Next fill up the glass bowl with cold water and add
more food colouring.
3. Place solution in a glass
4. Now attach the paper clip to the
string, then wrap string tightly around
pencil.
5. Leave for overnight and see how your
crystals have grown.
The science behind:
This trick works because:
When the water is heated the particles gain more energy so they
dismantle the sugar particles and they become embedded in the
water molecules. Then when the water evaporates the sugar
particles don’t and they start to solidify in a crystalline structure
7
Rainbow a in glass
Equipment needed:
50g of sugar
5 Glasses
5 food colourings
400ml of water
A spoon
Method
1. Add one spoon full of sugar to the 1st glass.
2. Add two spoons to the 2nd glass, three to the 3rd,
and four to the 4th
3. Next add 100ml of water to each glass but
leave the 5th glass empty.
4. Add three drops of red food colouring to the 1st glass, yellow to
the 2nd, green to the 3rd and blue to the 4th and stir all well.
5. Now pour ¼ of the blue solution into the 5th glass.
6. *Tricky bit* Poor ¼ of the green solution into the 5th glass. To
do this you must pour the solution down a spoon, like so in the
picture above. Repeat this with the other three coloured
solutions.
7. Leave for 5-10 minutes and watch what happens.
The science behind:
This trick works because:
Each of the solutions had different densities so the
heaviest would stay on the bottom and the
lightest would stay on the top, they would not
mix
8
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