1. Solar Energy is a   Non Renewable Source of Energy   Very limited source of energy   Polluting Source of Energy   Renewable Source of Energy   Hint Half-n-half Clue   2. The center of the earth is known as the   Hydrosphere   Core   Atmosphere   Crust   Half-n-half Clue   3. The length of the days and nights is equal at the   North Pole   Tropic of Capricorn   Equator   South Pole   Half-n-half Clue   4. Coal is formed from   Rocks   Lava   Soil   Organic Matter   Half-n-half Clue   5. What is the name given to molten rocks that are erupted by a volcano?   Lava   Marble   Firestone   Slate   Half-n-half Clue   6. The shape of the earth is   Cubical   Conical   Flat   Spherical   Half-n-half Clue   7. Greenhouse effect will lead to   An increase in Oxygen Production   Decrease in atmospheric pressure   An increase in the temperature   Greater rainfall   Half-n-half Clue