1. The atmosphere exerts pressure on the surface of the earth.   True   False   2. Lime water turns milky after carbon dioxide is passed through it.   True   False   3. Which gas in the atmosphere saves us from the UV rays of the sun?   Nitrogen   Ozone   Oxygen   Carbon Monoxide   Hint Half-n-half Clue   4. Which of the following is NOT a noble gas?   Hydrogen   Argon   Helium   Krypton   Half-n-half Clue   5. A space that contains no air or any gas is known as   Pressurized Cabin   Hollow   Bubble   Vacuum   Half-n-half Clue   6. When hydrogen peroxide acts on Manganese Dioxide, oxygen is produced.   True   False   7. Which of the following is necessary for a substance to burn?   Light   Oxygen   Gasoline   Hydrogen   Half-n-half Clue