A bottle full of air...

Now let the bottle cool completely so that the balloon regains its original shape (see image below).

What will happen to the balloon if you put the bottle with the balloon into the freezer or the esky for half an hour?
Check your hypothesis in the experiment. Click on the correct answer.

a) Nothing happes!

b) The balloon inflates again!

c) The balloon is pushed into the bottle and inflates inside of it.