Question Bank(2016-17)
Sub : Science
Std : VI
Topic – Air Around Us
Q.I.Answer the following questions in one sentence.
1.Which gas in the atmosphere is essential for respiration?
2.Name two main gases present in the air.
3.Name any one component of air which does not support burning.
4.Name a gas in air which is used by plants for making food by photosynthesis.
5.What is wind?
6.What is the name of the layer around the earth is called?
7.Apart from nitrogen and oxygen, name two other gases present in air.
(1mark)
Q.II.Answer the following questions in short.
8.State two uses of wind mill.
9.Why deep sea divers carry oxygen cylinders with them?
10.What is the importance of water vapour in air?
11.State the importance of carbon di oxide for living things.
12.Why do policemen regulating traffic at a crowded city road crossing often wear masks?
13.Why does a lump of cotton wool shrink in water?
14.Why do plants need nitrogen?
15.How do aquatic animals like fish get oxygen required for breathing?
16.What is smoke? How is smoke produced?
17.Explain why, a burning candle stops burning after some time when covered with a vessel.
(2marks)
Q.III.Answer the following questions in brief.
18.What is air? State the composition of air.
19.Explain why, if the clothes of a person catch fire accidently, he is covered with a woolen
blanket.
20.Why do mountaineers carry oxygen cylinders with them while climbing high mountain?
21.What is atmosphere?why is it essential for life on earth?
22.What substance is present in bottle which appears to be empty? Explain why, earthworms
come out of the soil only during heavy rains.
(3marks)
Q.IVAnswer the following questions.
(5marks)
23.State any five uses of air.
24.How do plants and animals maintain the balance of oxygen and carbon di oxide gases in air?
25.Explain with diagram why, when an empty glass bottle is inverted into a bucket of water
vertically, water does not enter the bottle.
Topic – Water
Q.I.Answer the following questions in one sentence.
(1mark)
1.Mention one way in which sea water differs from river water.
2.Name one natural source of saline water.
3.Name the agency which provides heat for the evaporation of water from the earth’s surface during the
water cycle.
4.What name is given to the loss of water by the leaves of plants?
5.Why water is used in car radiators?
6.Name any two sources of water.
7.State one advantage of rainwater harvesting.
Q.II.Answer the following questions in short.
(2marks)
8.What is the main purpose of rainwater harvesting?
9.Name the process which is involved in the formation of—
a. dew
b. fog
10.What is transpiration?
11.What is the main technique of rainwater harvesting?
12.How does water help in the dispersal of seeds of plants and trees?
13.Why do water drops appear on the outer surface of a glass containing ice-cold water?
14.What happens if it does not rain in a region for a year or more?
15.How are the animals living in soil affected if it rains heavily?
16.We hang our wet clothes out to dry. What happens to the water in the clothes?
17.Name two main processes which transfer water present on the earth into water vapour continuously.
Q.III.Answer the following questions in brief.
18.What is the importance of water cycle in nature?
19.What is the source of ground water? Explain your answer.
20.Name the state of water:
a.Which is present in the air.
b.Which is taken out from the freezer of refrigerator.
c.Which flow from a tap.
21.Why do we need water? Explain why, ocean water is not fit for drinking?
22.How clouds are formed?
(3marks)
Q.IVAnswer the following questions.
(5marks)
23.State any five uses of water.
24.Why is it essential to conserve water? What are the various ways in which you can conserve water at
home?
25.What is water cycle? With the help of a labelled diagram, describe the water cycle in nature.