1. Podcast 20.3 Water

2. 20.3 Objectives Describe the Water Cycle Explain how Temperature and Humidity are related Identify various clouds by their appearance and altitudes that they typically occur Use pressure gradients to explain how winds are created and explain how Earths rotation affects their direction

3. Vocabulary Condensation Precipitation Humidity Dew Point Evaporation Transpiration Relative Humidity Evapotranspiration Transport Surface Water Infiltration Runoff Groundwater

4. The Water Cycle

5. Web Water Cycles There are many good water cycle websites – and a few with really silly songs… http://earthguide.ucsd.edu /earthguide/diagrams/wate rcycle/index.html http://www.ac-nancy- metz.fr/enseign/anglais/He nry/eau.htm#wc

6. Another View

7. Facts about water Of all the water on earth 97% of it is in oceans 3% is freshwater ½ of all freshwater is in Canada 60% of all freshwater used is for irrigation Many of the worlds population does not have access to freshwater

8. Drinking Water

9. Many believe the next world war could be over water

10. Temperature and Humidity At any temperature the air can only hold a specific amount of water – no more

12. Similar graph in Temperatures we know

13. When air cools at night What happens to the water it can no longer hold?

14. Dew Point The temperature at which water starts coming out of the air and forms liquid It gives you a clue as to how saturated the air is Will you get fog or frost tonight?

15. Indoors - Moisture causes problems

16. Clouds Clouds and fog form when the temperature drops below the dew point They come in many forms

18. Lower Level Clouds Stratus Think fog, mist Large, stretched out Cumulus Puffy low clouds

19. Mid Level Clouds Altostratus They look the same but higher Altocumulus They wont be as thick as regular cumulus

21. High Level Clouds Cirrus Wispy high level clouds Cirrostratus High sheets of clouds great sunsets

22. Rainmakers Nimbostratus 3 day rainstorms (welcome to Seattle) Days of yucky weather Cumulonimbus Thunderstorm clouds Grow in height – planes must avoid

24. Punch hole clouds

25. Weirdos Mammatus Clouds

29. Kelvin Helmholtz Clouds

30. Lenticular

31. Contrails What are the products of combustion?

32. End Podcast 20.2 Make sure you get your notes checked to receive credit. Then take them home and review them for next time