Answer the following questions:
1. What is the composition of air?
2. Write the uses of air pressure.
3. Explain the process of filtration of water using filter paper.
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Answer: 1 - Air is composed of nitrogen, oxygen, carbon dioxide, many other gases, water vapour and dust particles.
Answer: 2-Some common uses of air pressure in daily life are:
Inflating tires.
Playing musical wind instruments.
Drinking through straw.
Flushing toilets.
drawing water from well.
operating barometer.
Blowing up balloon.
breathing.
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