STD - 6th Test No.01
.
- 1.Which are the main factors important for sustaining the life on the earth?
- A.
Air
- B.
Water
- C.
Land
- D.
All above
- 2.How much percentage of the earth is occupied by land?
- A.
29%
- B.
71%
- C.
49%
- D.
39%
- 3.How much percentage of the earth is occupied by water?
- A.
29%
- B.
71%
- C.
39%
- D.
42%
- 4.Who fulfill our basic needs on the earth?
- A.
God
- B.
Man
- C.
Natural resources
- D.
Space
- 5.The living things and parts of the earth are occupy by the.........
- A.
Hydrosphere
- B.
Atmosphere
- C.
Lithosphere
- D.
All above
- 6.Which of the following sphere occupy large part of the earth?
- A.
Hydrosphere
- B.
Lithosphere
- C.
Both a and b
- D.
None of above
- 7.Which sphere on the earth occupy less part than Hydrosphere?
- A.
Hydrosphere
- B.
Lithosphere
- C.
Both a and b
- D.
None of the above
- 8.Which gases are present in the atmosphere?
- A.
Nitrogen
- B.
Oxygen
- C.
Argon
- D.
All above
- 9.Which of the following gas occupy large part of the atmosphere?
- A.
Argon
- B.
Carbon dioxide
- C.
Nitrogen
- D.
Oxygen
- 10.Which of the following gas occupy small part of the atmosphere?
- A.
Carbon dioxide
- B.
Oxygen
- C.
Argon
- D.
Nitrogen
- 11.What happen if we go higher and higher from the earth surface?
- A.
Amount of gases increases
- B.
Amount of gases decreases
- C.
No change in gases
- D.
Gases become harmfull
- 12.What is the use of Nitrogen to living things?
- A.
In airtight packing of foodstuffs.
- B.
Respiration
- C.
Producing food
- D.
Electric bulbs
- 13.What is the use of Oxygen to living things?
- A.
Airships
- B.
Food production
- C.
Electric bulbs
- D.
Respiration
- 14.What is the use of Carbon dioxide to living things?
- A.
Food production
- B.
Respiration
- C.
Electric bulbs
- D.
Airships
- 15.Which harmful substances are released in the air through by combustion of fuels?
- A.
Oxygen
- B.
Nitrogen
- C.
Carbon dioxide
- D.
Argon
- 16.How much percent of water on the earth is available for drinking?
- A.
97%
- B.
2.7%
- C.
100%
- D.
0.03%
- 17.How much percent of water on the earth is not available for drinking?
- A.
97%
- B.
2.7%
- C.
0.03%
- D.
100%
- 18.How much percent of water on the earth is present in form of ice?
- A.
97%
- B.
2.7%
- C.
0.03%
- D.
100%
- 19.Which of the following activitys should we do to save the water?
- A.
Use water sparingly
- B.
Block water
- C.
Let percolate the water
- D.
All above
- 20.It takes about a .................... years for a formation of 2.5 cm layer of a soil.
- A.
Hundred
- B.
Lakhs
- C.
Thousand
- D.
Ten
- 21.In which of the following growth do not take place?
- A.
Cat
- B.
Man
- C.
Stone
- D.
Plants
- 22.Which of following is necessary for growth of living things?
- A.
Air
- B.
Water
- C.
Shelther
- D.
Food
- 23.Living things inhale which of following gas for respiration?
- A.
Oxygen
- B.
Carbon dioxide
- C.
Nitrogen
- D.
Argon
- 24.Living things exhale which of following gas by respiration?
- A.
Oxygen
- B.
Nitrogen
- C.
Carbon dioxide
- D.
Argon
- 25.Which substances are formed during processes of digestion?
- A.
Useful
- B.
Waste
- C.
Harmful
- D.
Both b and c
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