Ch. 5 Weather Lessons 1-4 (8)

2. Are very tall and can produce thunderstorms.
5. Cold air moving downwards and clockwise forms a _________.
7. These have the fastest winds on Earth.
11. These form over land and thus are drier.
12. The temperature where condensation begins.
13. Warm air moving upwards and counterclockwise forms a _____.
15. Water needs a _____________ on which to condense.
16. Made of ice crystals and are high in the atmosphere.
17. This is a process in which silver iodide is used.
19. Form from water vapor condensing to form ice crystals.
21. Warm air masses have _______, while cold air masses have _______ pressure.
23. This is a vital part of the water cycle.
25. Sometimes cold and warm meet, and neither can move.
27. The process in which water vapor becomes liquid water.

1. Water droplets need to be at least 0.5 ___ for _______ to occur.
3. A warm, humid air mass that forms over the Gulf of Mexico. They can bring thunderstorms, heavy rain, or snow.
4. These are cold and typically form clouds. They can also bring heavy rain, or snow.
6. Cold air has high density and therefore, _______.
8. This is a boundary between two different air masses.
9. These are high winds that typically blow from west to east, and carry air masses around.
10. Can look like large lumps of cotton.
14. This county experienced a drought in which some farmers lost up to 50% of their crops.
18. Water enters the atmosphere through __________ from oceans and other bodies of water.
20. If the relative humidity is _______ the wet bulb temperature drops by a large amount.
22. This can grow to a large size and is typically made in layers.
24. Animals can add water vapor to the atmosphere by _____________.
26. Warm air is less dense and ________.