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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
  • Components of Soil
  • Types of Soil
  • Characteristics of Types of Soil
  • Uses/Importance of Soil
Soil

Soil is the uppermost layer of the earth’s surface (also called the earth’s crust) on which plants grow, or the loose materials that cover the land surfaces of the earth, and supports the growth of plants.

Components of Soil: 

Soil Components
Soil Components.
  • Organic Matter: This includes the remains of decayed plants and animals to form humus, it is about 5% of the soil by volume, and it provides nutrients for plants.
  • Inorganic or Mineral Matter: This forms the bulk of the soil making up about 45%, these include materials like sand, silt, and clay. It provides nutrients and support for plants.
  • Solid Air: It is about 25% of the soil by volume. It provides oxygen for respiration for soil organisms. 

 

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