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Question 1. How is our atmosphere different
from the atmospheres on Venus
and Mars?
Question 2. How does the atmosphere act as
a blanket?
Question 3. What causes winds?
Question 4. How are clouds formed?
Question 5. List any three human activities
that you think would lead to air
pollution.
Question 1. Why do organisms need water?
Question 2. What is the major source of fresh
water in the city/town/village
where you live?
Question 3. Do you know of any activity
which may be polluting this water
source?
Question 1. How is soil formed?
Question 2. What is soil erosion?
Question 3. What are the methods of
preventing or reducing soil
erosion?
Question 1. What are the different states in
which water is found during the
water cycle?
Question 2. Name two biologically important
compounds that contain both
oxygen and nitrogen.
Question 3. List any three human activities
which would lead to an increase
in the carbon dioxide content of air.
Question 4. What is the greenhouse effect?
Question 5. What are the two forms of
oxygen found in the atmosphere?
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