1. Solar Energy is a   Very limited source of energy   Renewable Source of Energy   Polluting Source of Energy   Non Renewable Source of Energy   Hint Half-n-half Clue   2. The length of the days and nights is equal at the   South Pole   Tropic of Capricorn   North Pole   Equator   Half-n-half Clue   3. Seismograph is the instrument used for recording earthquake shocks.   True   False   4. Greenhouse effect will lead to   Decrease in atmospheric pressure   Greater rainfall   An increase in Oxygen Production   An increase in the temperature   Half-n-half Clue   5. Gasoline is a non-renewable source of energy.   True   False   6. Stalactites and stalagmites consist of deposits of   Silica   Magnesium Carbonate   Calcium Carbonate   Sodium Bicarbonate   Half-n-half Clue   7. Which of the following elements is a chemical constituent of sand particles?   Carbon   Iron   Silicon   Sodium   Half-n-half Clue