First you need to gather up all of the materials you will need.  Below is a list of the following items needed to conduct this experiment:

• A bowl of water
• A glass bottle with a small mouth opening
• A coin bigger than the mouth opening of the bottle

Are you ready?  Let’s get started.  First you will need to fill the bowl with cold water.  Place the neck of the bottle and the coin in the water to get them nice and cold.  You need to do this so that when you place the coin on top of the mouth of the bottle, it forms an airtight seal.  Set the coin on top of the mouth of the bottle and then wrap your warm hands around the bottle.  Wait for a few seconds and observe what’s happening.  Then remove your hands and see what happens next.

What happened?  Did the coin jump?  It should have.  Can you figure out why?  When you wrap your hands around the bottle, the air inside the bottle heats up.  The warm air inside the bottle pushes harder than the cool air outside the bottle which then causes the coin to jump.  When the air inside the bottle cools, the coin will stop jumping.  Cool, huh?

### 19 Responses to Magic Coin Heat Experiment

1. Geena says:

This is a very cooll thing for me and it helps with my research i am doing at school thank you very much and i am sharing this to the class with my buddie tommorow :)))))) <33333333333 5/5 for this one

• Dana says:

i now it so cool right ekkkkkkkkkkkkkk

2. Olivia says:

Thank you <3

:putnam:

3. sara says:

i was like how did you do that!!!

4. Jamie Howell says:

I don’t think this is possible. First off how am i supposed to form an airtight seal? I’m 14 for peats sake!

5. ronald eran says:

what is its main objective?

6. jeff says:

Thanks for the cool experiment. This is a great site. My students loved this.

7. I want this experiment to do from 2 years and now i have that experiment

8. Very nice

9. rosie says:

that was a good project

10. courtney says:

would this be a chemical or physical change?

11. daniel kim says:

this experiment is ek awsome man

12. krishnica says:

It’s a cool one

13. marryjune pasaforte says:

wooooooow!!!!!!!!!!! i like it!!!!

14. woooow!!!!!! nice one!

15. de'onica says:

i really enjoy this projct it’s very fun!!!!!

16. de'onica says:

i really enjoy this projet it’s very fun!!!!!

17. Lem says:

Hey, thanks to this site! It helped me to demonstrate experiments at school. And , just a suggestion, you should increase the number of topics for the experiments so people can use it for many different topics. Thanks!!!