Earth’s SurfaceChapter 2 Weathering and Soil

1. Review and Reinforce2. Lesson Quiz

Answer Keys

Lesson 1 Rocks and Weathering Review and Reinforce Worksheet

• 1. Abrasion• 2. Acid rain• 3. Mechanical• 4. Chemical• 5. Carbonic acid• 6. Animal actions• 7. Mechanical• 8. Chemical• 9. Chemical• 10. The factors that determine the rate of

weathering are the type of rock and the climate.• 11. Permeable• 12. frost wedging

Lesson 1 Rocks and Weathering Quiz

1. D

3. B

5.uniformitarianism

7. oxidation

9. mechanical

2. C

4. A

6. pressure

8. rock

10. permeable

Lesson 2 How Soil Forms Review and Reinforce Worksheet

• 1. The A horizon is composed of topsoil, a crumbly, dark brown soil that is a mixture ofhumus, clay, and other minerals.

• 2. The B horizon, called subsoil, is made mostly of clay and other particles, but little humus.

• 3. The C horizon contains only partly weathered rock.• 4. Soil forms as rock is broken down by weathering and mixes with other

materials on Earth’s surface. It consists of a mixture of rock particles, minerals, decayed organic material, air, and water.

• 5. Some soil organisms mix the soil and make spaces in it for air and water. Other soil organisms make humus, the material thatmakes soil fertile.

6. h

8. f

10. d

12. g

14. e

7. b9. c

11. a13. e

Lesson 2 How Soil Forms Quiz

1. false/subsoil

3. false/bedrock

5. true

7. B

9. D

2. false/high

4. true

6. true

8. B

10. C

Lesson 3 Soil ConservationReview and Reinforce Worksheet.

• 1. Plowing• 2. drought• 3. Wind• 4. Dust Bowl.• 5. Soil is valuable because everything that lives on the surface depends

directly or indirectly on soil.• 6. Soil is damaged when it loses its fertility. Soil loss is caused by water

or wind erosion.• 7. Farms conserve soil by practicing contour plowing, conservation

plowing, and crop rotation.• 8. contour plowing• 9. Soil conservation• 10. conservation plowing• 11. crop rotation• 12. natural resource

Lesson 3 Soil Conservation Quiz

1.natural resource

3.erosion5.nutrients7.true9.true

2.conservation4.crop rotation6.limited8.decreased or reduced

10. Contour