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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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Global Warming

This is the accumulation of carbon dioxide and other pollutants in the atmosphere, owing to the emission into the atmosphere of large quantities of carbon dioxide from coal, diesel oil, petrol, kerosene, cooking gas, and firewood used for industrial and domestic purposes. 

These pollutants trap heat from radiation that would have normally escaped into space which causes the planet to get hotter.

The air in our atmosphere is composed of molecules of different gases. The most common gases are; 

Gas Volume
Nitrogen78.084%
Oxygen20.95%
Argon0.934%
Carbon dioxide0.0382%
Neonvariable 
Water vapourvariable 
composition of air
Composition of air.

Effects of Global Warming:

Effect of Global Warming - Polar Ice Disappearing
Effect of Global Warming – Polar Ice Disappearing.

1. The gradual covering of some low dry land with water from the oceans.

2. Increase in atmospheric temperature. 

3. Rising ocean levels. 

4. Climate change.

5. Unusual changes in ocean currents. 

6. Progressive melting of polar ice, in the arctic and antarctic zone, as a result of an increase in temperature.

Control of Global Warming:

1. Use of alternative sources of energy such as hydroelectric power, wind power, solar energy, and nuclear energy. 

2. Control of bush burning. 

3. Reduction in the amount of petrol used for driving cars through the use of biofuel (a mixture of petrol and ethanol) in place of petrol alone.

4. Reduction of emission of carbon dioxide into the atmosphere.

Use of Solar Energy helps control Global Warming
Solar Energy is an alternative source of energy which reduces carbon dioxide emissions.
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