Energy - class 8 science revision notes

• Energy Transformation.
• Energy Conservation
  • Ways of conserving energy
  • Advantages of Renewable Energy

Energy Transformation.

The law of energy conservation statesthat, energy cannot be created or destroyed but can be changed to other forms of energy.

Energy Conservation.

Energy conservation means protecting, preserving, restoring and managing energy resources.

Ways of Conserving of Energy.

1. Using energy sparingly by:
   1. Switching bulbs off when not needed.
   2. Using public transport instead of private vehicle.
   3. Using bicycles or walking for short distance.
   4. Using vehicles with low fuel consumption.
   5. Using thermosflask and hot pots to keep food hot.
   6. Using energy saving bulbs.
2. Using energy efficient devices.
   1. Modern jiko/improvised jiko
   2. Clay cookers.
3. Using renewable forms of energy.
   Renewable forms of energy refers to forms that are inexhaustible like wind, water, sunlight, food, biogas and forests.
   Non-renewable sources of energy are those that can get exhausted when use like petrol, diesel, kerosene, natural gas

Advantages of Renewable Energy.

• Are cheap.
• Do not pollute the environment.
• Help to conserve non renewable forms of energy.
• Readily available and in abundance.