I wish to compress a gas and a simple way to do this is to take a syringe (without the needle) place my thumb over the hole and push in the plunger.

1. What happens to the gas when it is compressed ?

Ask question 2 if the student does not say anything about temperature.

2. What would happen to the temperature of the gas ?

3. How could you predict the change in temperature ?

4. On a microscopic level can you explain why the temperature of the gas increases ?