1. Removal of the top layer of soil/rocks by wind, water is known as   Detoxification   Desalination   Corrosion   Erosion   Hint Half-n-half Clue   2. Natural hot water springs occurring in New Zealand, Italy and Iceland are known as   Old Faithfuls   Fountains   Hot Bubbles   Geysers   Half-n-half Clue   3. Greenhouse effect will lead to   Greater rainfall   An increase in Oxygen Production   An increase in the temperature   Decrease in atmospheric pressure   Half-n-half Clue   4. Seismograph is the instrument used for recording earthquake shocks.   True   False   5. What is the name given to molten rocks that are erupted by a volcano?   Marble   Slate   Firestone   Lava   Half-n-half Clue   6. The center of the earth is known as the   Core   Hydrosphere   Crust   Atmosphere   Half-n-half Clue   7. The surface of earth is mainly covered with   Ice   Mountains   Land   Oceans   Half-n-half Clue