Sound Vibrations:
This month we are learning about the workings of the
human ear and how sound is made.
We experimented with how we hear sounds by making
paper cup
telephones out of string and cups. When
you
pull the string taut the sound waves vibrate through it
from cup to cup!
Mending a broken plate with warm milk:
The idea is that the protein
called casein in the milk expands when heated and forms a
natural plastic and fills in the cracks. It then bonds with
the surfaces and as it cools, becomes one with your china. We broke a
plate and stuck it together with tape. Then we immersed it into a basin of warm
milk for two days.
Kitchen Chaos!
Baking soda and vinegar:
When you mix these two ingredients together they cause a chemical
reaction which releases gas. We experimented to find out…
We put vinegar in a bottle and baking soda in a balloon. Then
we fixed the balloon to the bottle and allowed the baking soda to fall in to
the vinegar. The reaction caused gas to
be released which resulted in the balloon blowing up!!
Caution: Do this experiment in a bath or outdoors as it is
quite messy!!
Bouncy Egg Lamp
When you soak a
fresh raw egg in vinegar for 24 hours something amazing happens.
The outer hard shell disintegrates leaving
just the membrane of the egg holding it all
together. This makes the egg seem “bouncy”. We put the egg sitting on top of a phone
torchlight and the result was beautiful-it looked like a lava lamp. You could
see right through the egg and locate the yolk.
Coke Milkshake!!
When Coke is mixed with milk,
the
phosphoric acid goes to work
and milk curdles into little
clumps.
What's surprising is what a change
that reaction makes to the Coke.
...
We're left with a bottle that is full
of liquid made from Coke and milk
juice, with the acid and protein
clumped together and out of the way.
It looks disgusting!!
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