Understanding the Importance of Clean Air in Our Environment
Explore the significance of air in our surroundings with key insights on nitrogen's role in plant growth, the composition of air, effects of burning garbage, and ways to keep the air clean. Learn about germs, air's benefits, and why burning garbage should be avoided for a healthier environment.
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Presentation Transcript
CH- 7 AIR AROUND US
Fill in the blanks- 1- Nitrogen helps plant grow. 2. Moving air is called wind. 3. Air is mainly composed of nitrogen followed by Oxygen gas. 4. Through garbage in the dustbin, do not burn it. 5. The oxygen present in air supports burning.
Write T for true and F for false- 1-Animals and human beings breathe in carbon dioxide .(F) 2- Nitrogen is released when plants and animals die and decay .(T) 3-We must burn the garbage .(F) 4- Air gets polluted by smoke and poisonous gases. (T) 5. Burning crackers cause air and noise pollution. (T)
Answer the following questions- Q1- What are germs? Ans- The small living organisms present in the air which cannot be seen with the naked eye are called germs. Q2-How is air useful to us? Ans- (1)Air helps in warming and cooling things. (2) It helps in drying cloth. (3) It helps to sail the boat.
Q3-Why shouldnt we burn the garbage? Ans-We shouldn't burn the garbage because it releases harmful gases which pollute the air. Q4-Give two ways by which we can keep the air clean. Ans- 1. Avoid burning wood and garbage. 2 .Grow more plants.
