1. Add about 10mL of water to a 50mL Erlenmeyer flask.  Place a small balloon over the opening of the flask and place the flask on the hot plate (the hot plate should be set to 8) until the water boils.  When the balloon performs its trick, remove it soon after so that you don't get scalded with hot water!
2. Observe and record what you see.

What happens to the balloon?

1. Circle the variables you are dealing with:  temperature pressure volume
2. show this: As ____________________ increases, ________________ increases.
3. The relationship between these variables is ___________________ (direct, inverse)