Air
Q.1. Give at least three examples to prove that air is around us.
Ans: We can not see air. But we can feel it when tossing, pushing and moving bag. Three examples to prove that air is around us-
Branches and leaves of trees move
Riding a bicycle
Moving pieces of papers
Q.2. Name four components of air.
Ans: The name of four components of air are –
Nitrogen
Oxygen
Carbon dioxide
Water vapour
Q.3. Describe three ways to prevent air pollution.
Ans: Three ways to prevent air pollution-
Reducing waste or garbage
Walking or riding a bicycle
By stopping the emission of black smoke.
Q.2. Match column A with column B to make a meaningful sentence.
Column A
a) Most living things
b) Plants need carbon dioxide to make
c) Various components of air are
d) Nitrogen is used in
e) Harmful things in the air come from
f) We can keep the air clean
Column B
i) making light bulbs.
ii) a variety of sources.
iii) by preventing pollution.
iv) used in our life.
v) their own food.
vi) need oxygen.
Science Grade-3 Chapter- 6 Air
Q.B. Write True/False, If False write the correct answer.
a) Air is not essential for living things to survive.
b) A gas in the air that can help something to burn is called carbon dioxide.
c) Air is made up of various kinds of gases.
d) Oxygen is used in fire extinguishers as it does not help to burn.
e) The fertilizer that is added to plants to make them grow well contains nitrogen
f) Air pollution makes people sick, such as respiratory illness and heart disease.
Q.B. Write True/False, If False write the correct answer.
a) Air is not essential for living things to survive. (False)
b) A gas in the air that can help something to burn is called carbon dioxide. (False) oxygen
c) Air is made up of various kinds of gases. (T)
d) Oxygen is used in fire extinguishers as it does not help burning.(False) carbon dioxide
e) The fertilizer that is added to plants to make them grow well contains nitrogen. (T)
f) Air pollution makes people sick, such as respiratory illness and heart disease.(T)
