Question

1.
Name any four gases present in the air
2. How does water vapour form in the atmosphere?
3. Why should drinking water be purified?
4. Name three processes involved in the treatment of the town water
D. Answer these questions,
1. How is air useful to us?
2. How is stratosphere a very important layer of atmosphere?
When a burning candle is covered with a glass, it gets extinguished
happen? What does this activity show?
What is sedimentation and decantation?
Explain filtration with the help of a diagram.
What is distilled water? What are its uses?​

Answer 1

Answer:

Here !!!

Explanation:

see the picture