Question : The energy that can harness heat stored below the earth's surface is known as:

Option 1: thermal energy

Option 2: nuclear energy

Option 3: tidal energy

Option 4: geothermal energy

Question : In a water-lifting electric pump, we convert

Option 1: electrical energy into potential energy

Option 2: kinetic energy into electrical energy

Option 3: kinetic energy into potential energy

Option 4: electrical energy into kinetic energy

Question : In which form is the supplied heat energy stored during change in temperature of substance?

Option 1: Heat energy

Option 2: Kinetic energy

Option 3: Potential energy

Option 4: Both kinetic and potential energy

Question : Which non-conventional energy source depends on the sun's heat?

Option 1: Wind energy
   

Option 2: Tidal energy
    

Option 3: Geothermal energy

Option 4: Solar energy

Question : 'Greenhouse effect' means

Option 1: Cultivation of crops in a greenhouse to conserve heat

Option 2: Trapping of solar energy due to carbon dioxide gases

Option 3: Trapping of solar energy by the Earth's upper surface

Option 4: Increase of heat due to atmospheric pollution