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5. 100 200 300 400 500 A- Water on Earth B- Weather Tools C- Water Cycle D- Air Masses E- Teacher’s Choice

6. How much of Earth’s surface is water? A- 1/3 B- 1/2 C- 3/4 D- 7/8 A 100

7. How much of Earth’s surface is water? C- 3/4

8. How are ocean water and fresh water different? A- Oceans are warmer than freshwater. B- Ocean water is salty and fresh water is not. C- Freshwater has minerals in it and ocean water does not. A 200

9. How are ocean water and fresh water different? B- Ocean water is salty and fresh water is not.

10. Why is the Baltic Sea less salty than other seas? A- Water travels quickly through the Baltic Sea. B- Deserts surround the Baltic Sea. C- The Baltic Sea is in a warm place. D- Many rivers flow into the Baltic Sea. A 300

11. Why is the Baltic Sea less salty than other seas? D- Many rivers flow into the Baltic Sea.

12. A 400 What fraction of Earth’s water is usable fresh water? A- ¾ B- 97/100 C- 2/100 D- 1/100

13. A 400 What fraction of Earth’s water is usable fresh water? D- 1/100

14. Where does the salt found in oceans come from? A- the salt shaker B- material dissolved from rocks and soils C- oceans D- evaporating salt water A 500

15. Where does the salt found in oceans come from? B- material dissolved from rocks and soils

16. What can you use to measure wind speed? A- barometer B- thermometer C- wind vane D- anemometer B 100

17. What can you use to measure wind speed? D- anemometer

18. Which of these will measure air pressure? A- humidity B- anemometer C- barometer D- thermometer B 200

19. Which of these will measure air pressure? C- barometer

20. What tool can measure wind direction? A – wind vane B- anemometer C- thermometer D- barometer B 300

21. What tool can measure wind direction? A – wind vane

22. DAILY DOUBLE

23. What might happen if Earth’s average temperature increases by a few degrees? A- We will enter an ice age. B- The polar ice caps might melt. C- There will be more salt water. D- There will be more fossil fuels. B 400

24. What might happen if Earth’s average temperature increases by a few degrees? B- The polar ice caps might melt.

25. What do curved lines on a weather map represent? A- areas with hills B- areas with clouds C- areas with similar air pressure D- areas with thunderstorms B 500

26. What do curved lines on a weather map represent? C- areas with similar air pressure

27. What is the Sun’s role in the energy cycle? A- Water evaporates in the Sun’s warmth. B- The sun makes water particles slow down. C- The Sun’s warmth changes water from a gas to a liquid. C 100

28. What is the Sun’s role in the energy cycle? A- Water evaporates in the Sun’s warmth.

29. What is condensation? A- rain becoming water vapor when it warms B- ice becoming liquid as it warms C- water vapor becoming liquid water as it cools D- rain becoming ice when it cools C 200

30. What is condensation? C- water vapor becoming liquid water as it cools

31. C 300 How will air at the top of a mountain be different than air at the base of the mountain? A- Air pressure will be lower at the top. B- Air pressure will be higher at the top. C- Air at the top will be denser. D- Air at the top will contain less mass.

32. C 300 How will air at the top of a mountain be different than air at the base of the mountain? A- Air pressure will be lower at the top.

33. Which best describes the water cycle? A- the movement of water between land and water B- the movement of water between Earth’s surface and the atmosphere C- the movement of clouds in the atmosphere C 400

34. Which best describes the water cycle? B- the movement of water between Earth’s surface and the atmosphere

35. C 500 What is the stage of the water cycle when water sinks into the soil and underground pores in rocks? A- evaporation B- condensation C- precipitation D- storage

36. C 500 What is the stage of the water cycle when water sinks into the soil and underground pores in rocks? D- storage

37. What happens when moist air rises? A- The moist air warms and water evaporates from the air. B- The moist air cools and is able to store more precipitation. C- The moist air cools and the water vapor condenses into clouds. D 100

38. What happens when moist air rises? C- The moist air cools and the water vapor condenses into clouds.

39. DAILY DOUBLE

40. D 200 What do the curving lines on this chart show? A- areas with the same air pressure B- areas of low pressure C- areas of low and high temperatures

41. D 200 What do the curving lines on this chart show? A- areas with the same air pressure

42. D 300 Which best describes air? A- a force that presses gases toward Earth’s surface B- a substance that surrounds Earth and takes up space C- a substance with no mass that contains water vapor

43. D 300 Which best describes air? B- a substance that surrounds Earth and takes up space

44. How will the air at the top of the mountain be different from the air at the base of the mountain? A- Air at the top will be denser. B- Air pressure will be higher at the top. C- Air pressure will be lower at the top. D 400

45. How will the air at the top of the mountain be different from the air at the base of the mountain? C- Air pressure will be lower at the top.

46. What happens when air hits an area of lower pressure? A- The air moves toward the area of lower pressure. B- Air that was moving comes to a standstill. C- The particles in the air become more loosely packed. D 500

47. What happens when air hits an area of lower pressure? A- The air moves toward the area of lower pressure.

48. What is humidity? A- the amount of water in the air B- air pressure C- how strong the wind is D- whether air pressure is rising or falling E 100

49. What is humidity? A- the amount of water in the air

50. Which best describes stratus clouds? A- low-lying white clouds B- clouds high in the sky C- high, white and puffy clouds that may appear in good weather D- clouds close to the ground that often bring rain or snow E 200

51. Which best describes stratus clouds? D- clouds close to the ground that often bring rain or snow

52. E 300 Why do you often see clouds along a cold front? A- Cold air makes the clouds visible. B- Cold air moves the warm air to form clouds. C- Clouds are left from the warm front. D- Water vapor in the cooling air turns into clouds.

53. E 300 Why do you often see clouds along a cold front? D- Water vapor in the cooling air turns into clouds.

54. What can scientists look at to study past climates? A- tree rings B- Earth’s crust C- ice core samples D- all of the above E 400

55. What can scientists look at to study past climates? A- tree rings B- Earth’s crust C- ice core samples D- all of the above

56. What happens when a cold air mass meets a warm air mass that is not moving? A- It creates a cold front. B- It creates a warm front. C- It causes evaporation. D- The water cycle. E 500

57. What happens when a cold air mass meets a warm air mass that is not moving? A- It creates a cold front.