Environment, Ecosystems & Energy Sources

JKSSB Panchayat Account Assistant · Science · 8 practice questions with answers and explanations: 3 Easy, 3 Medium, 2 Hard.

Sample questions

Sample Easy question 1

Which of these is a non-conventional (renewable) source of energy?

  1. Natural gas
  2. Coal
  3. Solar energy
  4. Petroleum
Show answer

Answer: C. Solar energy is a non-conventional, renewable source of energy, unlike fossil fuels such as petroleum, natural gas, and coal.

Sample Medium question 2

The Greenhouse Effect refers to the:

  1. Cooling of the earth caused by an excess of oxygen in the air
  2. Trapping of heat in Earth's atmosphere by gases like carbon dioxide
  3. Depletion of groundwater caused by excessive irrigation
  4. Formation of acid rain caused by oxides of sulphur only
Show answer

Answer: B. The Greenhouse Effect is the process by which gases like carbon dioxide and methane trap heat in Earth's atmosphere, warming the planet.

Sample Hard question 3

Tidal energy is generated by harnessing the:

  1. Rise and fall of ocean tides caused by gravitational forces
  2. Heat that comes from deep inside the earth's crust
  3. Combustion of fossil fuels in a power plant
  4. Splitting of atomic nuclei in a reactor
Show answer

Answer: A. Tidal energy harnesses the natural rise and fall of ocean tides, caused mainly by the gravitational pull of the moon and sun.

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