1. water vapor humidity relative humidity transpiration cloud formation thermal convection meteorologist Chapter 10, Lesson 4Water Vapor and Humidity

2. water vapor - water in its gas form is water vapor. If you can see it, it’s not really water vapor!

3. humidity – the level of moisture in the air; the amount of water vapor in the air

4. relative humidity – is when you compare how much water vapor is in the air to how much it COULD hold

5. dew point – point when the air is completely saturated with moisture and can hold no more.

6. transpiration –watery vapor passed through a membrane or pores in a plant

7. transpiration –watery vapor passed through a membrane or pores in a plant

8. cloud formation – the way clouds form

9. cloud formation – the way clouds form

10. cloud formation – the way clouds form

11. cloud formation – the way clouds form

12. cloud formation – the way clouds form

13. thermal – a rising air current caused by heating the Earth’s surface (radiation)

14. thermal – heated air that risesthermals help these birds to soar,they help gliders soar, too. They push air into the atmosphere, that cools and forms clouds

15. convection – when relatively warm air is raised into the atmosphere, often cooling and forming clouds

16. meteorologist – a scientist who deals with the atmosphere, including weather and climate