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Heat Experiment - Magic Jumping Coin

 
Magic Coin
Materials you will need:

• Bowl of cold water

• Coin (bigger than the bottle opening)

• Glass Coke Bottle (with a small opening/mouth)

This is magic!

 
What happens to air’s push when you heat it up?

 Air’s pressure or air’s pushing power changes when it is heated.


Steps:

1.  Fill a bowl with some cold water.

2.  Place the bottle neck and coin in the bowl of water to chill them.  This helps to make an airtight seal when you place the coin on the top of the bottle.

3.  Place the coin on the top of the bottle.

4.  Wrap your hands around the bottle and wait for several seconds.

What happens to the coin?

5.  Remove your hands from the bottle and wait.

What happens to the coin now?

Why does the coin jump?  

When you hold the bottle with your hands, the air inside the bottle heats up.

The warm air pushes harder than the cool air that is outside the bottle so it forces the coin up.  

When the air inside the bottle cools down the coin will stop jumping.

 
 
Subjects :  


 
 
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