1. Soil and Water Cycle Review
Mrs. DeLaura’s 3rd Grade Class

2. The carrying of weathered pieces of rock by wind, water, and gravity is called _____.

3. erosion

4. The breaking down of rock into smaller pieces, such as sand, silt, or clay is called ______.

5. weathering

6. Land surfaces that are not covered with plants are more likely to _______.

7. lose soil through erosion

8. Soil is created by a process of ____.

9. weathering

10. Materials that plants need to live and grow are ___________.

11. nutrients

12. Soil helps plants to grow by providing ____ and _____.

13. support and nutrients

14. The components of soil are ___________.

15. rock, clay, silt, sand, and humus

16. The upper surface layer of soil is called ______.

17. topsoil

18. The layer of rock underneath the topsoil is called ____.

19. subsoil

20. The layer of soil that has the most nutrients for plants is the _____.

21. topsoil

22. The plant nutrients in soil come from _____.

23. humus

24. The solid layer of rock beneath the subsoil and loose rocks is called _____.

25. bedrock

26. There is a layer of loose rocks between the ______ and ______.

27. topsoil and subsoil

28. The pieces of decayed plants and animals in soil are called _____.

29. humus

30. The top layers of soil are produced when bedrock _______.

31. breaks into smaller pieces

32. The process of producing soil takes many ______.

33. years

34. Tiny particles of soil the are tightly packed, hold water well and provide some nutrients are called _____.

35. clay

36. Small grains of worn down rock that have few nutrients and do not hold water well are ______.

37. sand

38. Soil particles that are larger than clay, but smaller than sand are _____.

39. silt

40. The energy source that drives the water cycle is the ____.

41. sun

42. The three processes that are involved in the water cycle are ___, ___, and ___.

43. Evaporation, condensation, and precipitation

44. Ponds, lakes, streams, oceans, and underground are all places where _____.

45. water is stored

46. The movement of water from the ground to the air and then back to the ground is called ____.

47. The water cycle

48. The process by which liquid water is turned to water vapor is called ____.

49. evaporation

50. The process in the water cycle by which water vapor is changed back into liquid water is called ____.

51. condensation

52. The collecting of water in streams, lakes, and oceans is called _____.

53. accumulation

54. In order for water to evaporate it must be ____.

55. heated

56. In order for condensation to occur, water vapor must be ____.

57. cooled

58. Water that falls from the sky is called ____.

59. precipitation

60. The forms of precipitation are ___, ___, ___, and ___.

61. rain, sleet, hail, and snow

62. Runoff from over-fertilized lawns and fields, oil from parking lots, soil erosion and animal waste are all forms of _____.

63. Water pollution