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 Air and Atmosphere 40 Flashcards |
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What gas makes up approximately 21% of the air? |
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Oxygen |
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Which of the following gases does NOT support combustion? A) Oxygen B) Nitrogen C) Hydrogen D) Carbon dioxide |
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B) Nitrogen |
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Riddle: I am essential for life and part of the air, but I do not burn. What am I? |
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Nitrogen |
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True or False: The Earth's atmosphere extends up to 1500 km above the surface. |
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False. The Earth's atmosphere extends up to 480 km. |
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The process by which plants use carbon dioxide and sunlight to make food is called ______. |
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Photosynthesis |
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What is the primary reason for the increase in carbon dioxide levels in the atmosphere over the past century? |
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Burning of fossil fuels |
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Which gas is primarily responsible for the greenhouse effect? |
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Carbon dioxide |
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Fill in the blank: Air is a mixture of gases, mainly nitrogen (78%) and ______ (21%). |
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Oxygen |
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True or False: Air is a single substance and can be represented by a chemical formula. |
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False. Air is a mixture of gases and cannot be represented by a single chemical formula. |
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Riddle: I help plants grow and am found in the soil, but I do not support burning. What am I? |
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Nitrogen |
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What harmful effect can air pollution have on human health? |
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It can cause breathing problems, headaches, and lung cancer. |
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Fill in the blank: The equation for respiration is: Food + Oxygen → ______ + Carbon dioxide + Water. |
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Energy |
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Which gas is used in fire extinguishers because it does not support combustion? |
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Carbon dioxide |
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What is the role of water vapour in the atmosphere? |
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It is important for the water cycle. |
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True or False: Dust particles in the air can help form clouds. |
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True. |
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Fill in the blank: The main components of air are nitrogen, oxygen, argon, and ______. |
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Carbon dioxide |
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What natural process helps maintain the balance of oxygen and carbon dioxide in the atmosphere? |
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Photosynthesis |
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Riddle: I can be found in the air, I help you breathe, but I am not visible. What am I? |
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Air |
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What is the primary source of air pollution caused by vehicles? |
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Smoke and harmful gases from fuel combustion. |
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What is acid rain and how is it formed? |
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Acid rain is formed when harmful gases mix with water droplets in the air, damaging the environment. |
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