1) Which gas is essential for breathing? a) Nitrogen b) Oxygen c) Carbon dioxide d) Helium 2) Which of the following is NOT a component of air? a) Water vapor b) Dust particles c) Plastic d) Oxygen 3) What is moving air called? a) Strom  b) Fog c) Smoke d) Wind 4) Which season is usually hot? a) Winter b) Rainy c) Summer  d) Spring 5) Which of these can pollute the air? a) Planting trees b) Drinking water c) Using solar energy d) Burning garbage 6) Which season is known for heavy rainfall? a) Summer b) Winter c) Rainy d) Spring 7) Air is a mixture of gases. a) True  b) false  8) The presence of dust particles in the air can cause pollution. a) True b) false 9) Plants take in oxygen and release carbon dioxide a) false b) True 10) Smoke and harmful gases improve air quality a) false b) True

Air around us

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