1. Science Unit Test on Soil 3.7 & 3.10

2. The carrying of weathered pieces of rock by wind, water, and gravity is 1.weathering 2.erosion 3.evaporation 1234567891011121314151617181920 21222324252627282930

3. The breaking down of rock into smaller pieces, such as sand, silt or clay is 1.conservation 2.erosion 3.weathering 1234567891011121314151617181920 21222324252627282930

4. Land surfaces that are not covered with plants… 1.Are less likely to lose soil through erosion 2.Are more likely to lose soil through erosion 3.Have the same likelihood of losing soil as land surfaces that are covered with plants 1234567891011121314151617181920 21222324252627282930

5. Which of the following is not a normal part of soil? 1.rock 2.silt 3.sand 4.glass 1234567891011121314151617181920 21222324252627282930

6. Plants grow better in which type of soil? 1.sand 2.clay 3.topsoil 4.subsoil 1234567891011121314151617181920 21222324252627282930

7. What is formed when freezing water cracks rocks apart? 1.Silt or sand 2.fossils 3.Gems or metals 4.topsoil 1234567891011121314151617181920 21222324252627282930

8. Why is it important to protect topsoil? 1.It protects subsoil 2.It is necessary for landscaping 3.It grows plants and food 4.It costs a lot to manufacture 1234567891011121314151617181920 21222324252627282930

9. What is topsoil made of? 1.Metals and dead plants 2.Weathered rock and humus 3.Gems and ores 4.Weathered rock and ores 1234567891011121314151617181920 21222324252627282930

10. Why do plants and animals depend on soil? 1.Soil is needed to walk on 2.Soil provides air for animals to breathe 3.Soil provides support and nutrients for the animals to eat 4.Soil is needed for animals to sleep on 1234567891011121314151617181920 21222324252627282930

11. What is soil erosion? 1.Topsoil covered with chemicals 2.Plants die for lack of water in soil. 3.Topsoil is carried away by wind and water 4.Too much fertilizer is used, hurting crops 1234567891011121314151617181920 21222324252627282930

12. Soil provides plants with which of the following? 1.roots 2.oxygen 3.support 4.heat 1234567891011121314151617181920 21222324252627282930

13. Soil is made up of 1.Rock, clay, plastic, and wood 2.Sand, metal, and clay 3.Rock, clay, silt, sand, and humus 1234567891011121314151617181920 21222324252627282930

14. Materials that plants need to live and grow are… 1.Nutrients 2.Bedrock 3.Sand and rock 1234567891011121314151617181920 21222324252627282930

15. Which layer of soil has the most nutrients? 1.bedrock 2.subsoil 3.topsoil 1234567891011121314151617181920 21222324252627282930

16. The pieces of decayed plants and animals in soil are called 1.humus 2.subsoil 3.clay 1234567891011121314151617181920 21222324252627282930

17. The layer of rock beneath the subsoil and loose rock is 1.bedrock 2.topsoil 3.humus 1234567891011121314151617181920 21222324252627282930

18. The process of making soil takes many 1.days 2.months 3.years 1234567891011121314151617181920 21222324252627282930

19. Which of the following is NOT a way of conserving soil? 1.Planting the same crops every year in a field 2.Contour plowing a field 3.Planting new young trees (seedlings) after cutting down trees for lumber 4.Rotating the crops planted in a field regularly 1234567891011121314151617181920 21222324252627282930

21. Which layer has the most nutrients? 1.A 2.B 3.C 1234567891011121314151617181920 21222324252627282930

22. Which layer has the most non-living material? 1.A 2.B 3.C 1234567891011121314151617181920 21222324252627282930