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JSS3: BASIC SCIENCE - 1ST TERM

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

1. Rapid runoff causes soil erosion. Runoff is the flow of water occurring on the ground surface, when excess rainwater, stormwater, meltwater, or other sources, can no longer sufficiently enter the soil.

Surface water runoff
Surface water runoff.

2. Change in habitat, displacement of population settlement.

flooded area
Displaced people carry their belongings to get away from floods during heavy rain.

3. Causes pollution due to deposition of debris. 

Debris from flooding
Debris from flooding.

4. Destruction of crops, farmlands, etc.

Flooded rice field
Flooded rice field.

5. It creates health hazards through pollution. 

6. Roads, electric poles, airlines, etc may be destroyed by floods.

Road damaged by flood
Road damaged by flood.

7. It can lead to the spread of water-borne diseases. 

Flood victims at risk of waterborne diseases
Flood victims are at risk of waterborne diseases.

Beneficial Effects of Flooding:

1. Improves Soil Fertility: Land may become fertile after being flooded due to the deposition of materials.

Fertile Flood Plains
Fertile Flood Plains.

2. Useful for Growth of Crops: Swamps in flooded areas are useful for the growth of crops, such as rice and other grains.

3. Agricultural Irrigation: Water from floods can be used for irrigating farmland, and this is called Flood Irrigation

Flood Irrigation - Soybeans
Flood Irrigation – Soybeans.
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