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JSS3: BASIC SCIENCE - 1ST TERM

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  1. Family Traits | Week 1
    7 Topics
    |
    1 Quiz
  2. Environmental Hazards I - Soil Erosion | Week 2
    3 Topics
  3. Environmental Hazards I - Flooding | Week 3
    5 Topics
    |
    1 Quiz
  4. Environmental Hazards II - Bush Burning | Week 4
    4 Topics
  5. Environmental Hazards II - Deforestation | Week 5
    4 Topics
    |
    1 Quiz
  6. Environmental Hazards III - Desertification | Week 6
    4 Topics
    |
    1 Quiz
  7. Environmental Hazards III - Description of the Ozone Layer and its Location in the Atmosphere | Week 7
    4 Topics
    |
    1 Quiz
  8. Drug and Substance Abuse | Week 8
    4 Topics
    |
    1 Quiz
  9. Resources from Living Things | Week 9
    4 Topics
  10. Resources from Non-Living Things | Week 10
    2 Topics
    |
    1 Quiz



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Topic Content:

  • Definition of Soil Erosion
  • Types of Soil Erosion
  • Causes of Soil Erosion
Soil Erosion
Soil Erosion.

What is Soil Erosion?

Soil erosion can be defined as the gradual wearing away of the top layer of soil, and transportation of soil material by wind or water to another place.

Types of Soil Erosion:

There are three types, namely:

  • Sheet Erosion
  • Gully Erosion
  • Rill Erosion

1. Sheet Erosion:

Occurs when the topsoil is removed evenly over an area by rainwater.

Sheet Erosion
Sheet Erosion.

2. Gully Erosion:

Occurs when rainwater flows in definite paths, which results in the cutting of channels. Channels continue to deepen and weaken to form gullies. Gully erosion is very common in southeastern Nigeria, in places like Abia, Anambra, etc.

gully erosion
gully erosion
Gully erosion.

 

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