Conservation of Sources of Energy

Mineral and Power Resources of Class 8

  • Conservation is possible by making use of renewable sources of energy.
  • Use energy in a planned way.
  • Burning of waste to generate power.
  • General increase in power efficiency of machinery and appliances.
  • Increase in power station efficiency.

Do You Know

  1. The salt in your food and graphite in your pencil are also minerals.
  2. A rock is an aggregate of one or more minerals but without definite composition of constituent of mineral. Rocks from which minerals are mined are known as ores. Although more than 2800 types of minerals have been identified, only about 100 are considered ore minerals. Thus one can easily notice that all minerals are rocks but all rocks are not minerals.
  3. You can always tell if a rock contains copper because then the rock looks blue in colour.
  4. Switzerland has no known mineral deposit in it.
  5. A green diamond is the rarest diamond.
  6. The oldest rocks in the world are in Western Australia. They date from 4300 million years ago,       only 300 million years after the earth was formed.
  7. The word petroleum is derived from Latin words - Petra meaning rock, oleum meaning oil. So, petroleum means rock oil.
  8. Compressed natural gas (CNG) is a popular eco-friendly automobile fuel as it causes less pollution than petroleum and diesel.
  9. Norway was the first country in the world to develop hydroelectricity.
  10. The site of the world's first solar and wind powered bus shelter is in Scotland.
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