Page 69 - EVS Class 01
P. 69
A. Answer the following questions.
1. Why do we all need air?
2. How air is important for an aeroplane?
3. Write the uses of air.
B. Fill in the blanks.
1. Air is our ____________ need.
2. ____________ is needed for burning.
3. Layer of air 400 miles high is called ____________ .
C. State whether the following statements are right or wrong .
1. It is healthy to breathe in unclean air.
2. Air is needed for burning.
3. We can see the air around us.
4. Air does not help aeroplanes to fly.
D. Choose the correct option for the following.
1. We cannot live without ___________ .
a) air b) birds
c) planes d) toys
2. Air helps in ___________ .
a) breathing b) flying
c) burning d) all of these
3. We use air for ___________ .
a) breathing b) burning
c) both a) & b) d) none of these
4. Air contains ____________ oxygen in it.
a) 21% b) 28%
c) 23% d) 24%
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