UNIT 5 – Water/ Air

1.       evaporation – liquid to a gas

2.       condensation – gas to a liquid

3.       precipitation – water falling to the ground; rain, snow, sleet or hail

4.       water cycle – constant recycling of water

5.       air pressure – amount of air pressing down on earth’s atmosphere

6.       atmosphere – blanket of air surrounding the earth

7.       greenhouse effect – earth’s atmosphere trapping energy from the sun

8.       buoyancy – the ability to float

9.       density – causes an object to sink

10.   air mass – huge body of air