1. What is the name given to molten rocks that are erupted by a volcano?   Slate   Marble   Lava   Firestone   Hint Half-n-half Clue   2. The center of the earth is known as the   Hydrosphere   Core   Crust   Atmosphere   Half-n-half Clue   3. Which of the following is a main component of common glass?   Powdered Mica   Water   Sand   Marble   Half-n-half Clue   4. The length of the days and nights is equal at the   Equator   South Pole   North Pole   Tropic of Capricorn   Half-n-half Clue   5. Greenhouse effect will lead to   An increase in Oxygen Production   Greater rainfall   An increase in the temperature   Decrease in atmospheric pressure   Half-n-half Clue   6. The surface of earth is mainly covered with   Mountains   Oceans   Ice   Land   Half-n-half Clue   7. What is caused by the slight tilt of the earths axis?   Day and Night   Seasons   Tides   Earthquakes   Half-n-half Clue