1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 Water Vapor in the air Clouds Water falling from the sky Air Masses Fronts

2. The changing of liquid water to gas (water vapor) is called:_______________

3. evaporation

4. The amount of water vapor in the air is called its ___________.

5. humidity

6. Cold air can hold ________ water vapor than warm air. A. more B. less C. the same amount of

7. B. less

8. Definition: The amount of material something can hold.

9. capacity

10. The amount of water vapor the air is holding compared to the amount it can hold is called the: ___________ humidity.

11. relative humidity

12. Clouds are made of __________.

13. Water droplets and / or ice crystals

14. Clouds that form near the ground are called ___.

15. fog

16. Large, anvil shaped thunder clouds are called _________.

17. cumulonimbus

18. Thin feathery clouds made of ice crystals are called: __________ clouds.

19. cirrus

20. The process of water vapor sticking together to form drops is called: __________.

21. condensation

22. Water that falls back to Earth is called ___________.

23. precipitation

24. Precipitation that is lumps of ice is called: ____.

25. hail

26. Ice crystals that fall to the ground are called: _____.

27. snow

28. Precipitation can be liquid or _______.

29. solid

30. What is sleet and how does it form?

31. Rain that freezes as it falls through cold air near the Earth.

32. Polar air masses are _____ air.

33. cold

34. Tropical air masses are ____ air.

35. warm

36. Continental means the air mass forms over ____.

37. land

38. Maritime means the air mass forms over the ______.

39. oceans

40. Name the four types of air masses.

41. Maritime polar, maritime tropical, continental polar, continental tropical

42. What is a front?

43. Boundary between air masses

44. Fronts bring ________ in weather.

45. changes

46. Cold fronts push ______ warm air.

47. under

48. Name the four types of fronts.

49. Cold, warm, stationary and occluded.

50. _______ fronts bring very little change in weather.

51. Stationary