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1. What is air made up of?
Ans. Air is primarily made up of nitrogen (about 78%) and oxygen (about 21%), with small amounts of other gases such as carbon dioxide, argon, and water vapor.
2. How does air help in breathing?
Ans. When we breathe, we inhale oxygen from the air, which is essential for our body's cells to function properly. The oxygen is then carried by our blood to all parts of the body.
3. What is the importance of air for plants?
Ans. Plants take in carbon dioxide from the air during photosynthesis, a process in which they convert sunlight into energy. They release oxygen back into the air, which is essential for animals and humans to breathe.
4. How does air help in maintaining the Earth's temperature?
Ans. Air acts as a natural insulator, trapping heat from the sun to keep the Earth's surface warm. It also helps regulate the temperature by circulating heat around the planet through winds and currents.
5. What are some common pollutants found in the air?
Ans. Common air pollutants include particulate matter, sulfur dioxide, nitrogen oxides, carbon monoxide, and volatile organic compounds. These pollutants can have harmful effects on human health and the environment.
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