1. What is caused by the slight tilt of the earths axis?   Day and Night   Seasons   Tides   Earthquakes   Hint Half-n-half Clue   2. Granite and quartz are igneous rocks.   True   False   3. Which of the following elements is a chemical constituent of sand particles?   Silicon   Sodium   Carbon   Iron   Half-n-half Clue   4. The surface of earth is mainly covered with   Land   Oceans   Mountains   Ice   Half-n-half Clue   5. Removal of the top layer of soil/rocks by wind, water is known as   Corrosion   Erosion   Desalination   Detoxification   Half-n-half Clue   6. Natural hot water springs occurring in New Zealand, Italy and Iceland are known as   Old Faithfuls   Fountains   Geysers   Hot Bubbles   Half-n-half Clue   7. Stalactites and stalagmites consist of deposits of   Calcium Carbonate   Sodium Bicarbonate   Silica   Magnesium Carbonate   Half-n-half Clue