Soil Erosion Video
Name :___________________________________________________ Period: _____ Date: ___________
Essential Question: How do we practice soil conservation?
1. Where is soil erosion happening?
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2. Who practices soil conservation?
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3. How do farmers practice soil conservation?
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4. Draw, label, and describe the soil box with three compartments.
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5. Explain why the third compartment has the highest degree of soil erosion.
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6. What is the disadvantage of plowing or soil tilling?
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7. What are the alternatives for soil tilling or plowing?
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8. What are the benefits of no till or minimum till?
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9. Why are farm residues (stem and leaves of crops) left on farm lands?
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10. Why is soil erosion considered as major problem in farming?
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11. What do we need to do to safeguard the future of our world?
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12. Who are the key to the Green Economy? Why?
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13. What is agriculture? Think!
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14. Why do we need more food as years go by?
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15. How can we help farmers produce more food?
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16. How do plants help lower air pollution and prevent soil degradation? Think!
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17. Watch and Read: What erosion prevention technique was used in building the Banaue Rice terraces in the
Philippines? How does this technique prevent soil erosion?
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____18. Which is more likely to prevent mass-movement events?
A. constructing buildings in stream drainage paths C. paving roads next to sloping hills
B. clear-cutting trees from the side of a mountain D. contour plowing of crop areas
____19. How does the replacement of large land areas with concrete and asphalt affect the land?
A. It changes the bedrock of underlying layers of soil.
B. It prevents the dynamics of the rock cycle.
C. It increases the amount of groundwater in porous rock.
D. It increases erosion of sediments by increasing runoff.
20. How is Soil Mulching done?
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21. How is erosion prevented?
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____22. Which of the following sequences of action is the best way to solve the problem of wetland erosion?
A. add sediments, plantings, monitor plantings
B. dredging, sand bags, plantings
____23. How does frost wedging affect the surface of the Earth?
A. It reduces the rates of soil formation. B. It exposes rocks to increased rates of weathering.
_____24. Which is a farming technique that could improve the soil and the environment?
A. using fueled machines that will turn the soil continuously
B. placing inorganic chemical fertilizers in the soil
C. creating undisturbed layers of mulch in the soil
D. irrigating the soil with salty water
25. Matching type: Preventing Soil Erosion
____ mulch
____ no till farming
____ irrigation
____ surface area
____ Dredging
____ frost wedging
A. artificial application of water to the land or soil.
B. the outside part or uppermost layer of something.
C. scooping out sediments from the river bed.
D. farming technique where soil is not disturbed to prevent erosion.
E. decaying leaves, bark, or compost spread on soil.
F. repeated freeze-thaw cycle of water. A physical weathering.
26. Matching type: Erosion
____ runoff
____ water
____ wind
____ topsoil
A. greatest agent of erosion.
B. water flowing on the surface.
C. agent of weathering and erosion in the desert.
D. uppermost most layer of the soil, rich with organic materials.
26. Review: What are the different ways to prevent coastal erosion?
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Key:
18. D
19. D
22. A
23. B
24. C
25. E, D, A, B, C, F
26. B, A, C, D