1. Class 4b: Precipitation

2. Clouds Collections of tiny drops or ice crystals Source of all precipitation

3. Clouds Cirriform: thin and wispy (ice)

4. Clouds Stratiform: grey and low

5. Clouds Cumuliform: white, flat-bottomed, puffy

6. Fog A cloud on the ground

7. Fog

8. Precipation: rain Collision and coalescense in the tropics Ice crystals elsewhere

9. Precipation Rain: Snow: Sleet: Glaze or freezing rain:

10. Atmospheric lifting Four ways a parcel of air might rise Convective lifting

11. Atmospheric lifting Orographic lifting (mountains)

12. Atmospheric lifting Frontal lifting Convergent lifting

13. Global distribution of precipitation Nature of air masses How much uplifting

14. Global distribution of precipitation Tropics: generally very rainy

15. Global distribution of precipitation Subtropics: generally very dry

16. Global distribution of precipitation Midlatitudes: wide variation