Page No 193:
Question 1:
How is our atmosphere different from the atmospheres on Venus and Mars?
Page No 194:
Question 2:
What is the major source of fresh water in the city/town/village where you live?
Page No 201:
Question 1:
What are the different states in which water is found during the water cycle?
Page No 201:
Question 3:
How are living organisms dependent on the soil? Are organisms that live in water totally independent of soil as a resource?
Page No 201:
Question 4:
You have seen weather reports on television and in newspapers. How do you think we are able to predict the weather?
Page No 202:
Question 5:
We know that many human activities lead to increasing levels of pollution of the air, water-bodies and soil. Do you think that isolating these activities to specific and limited areas would help in reducing pollution?
