Air Around us Class 6 Quiz Question with Answer
Air Around us Class 6 Quiz Question with Answer. CBSE Class 6 Science Lesson 15 Mock Test.
(1) Which of the following is color of air?
(a) blue
(b) black
(c) brown
(d) none of these
Answer: – d) none of these
Explanation: – air has no color it is colorless.
(2) Which of the following option is correctly placed in the blank space of sentence;
Earth is surrounded by ___________ of air.
(a) Thick layer
(b) thin layer
(c) hottest layer
(d) none of these
Answer: – b)thin layer
Explanation: – Earth is surrounded by thin layer.
(3) Which of the following option is correctly placed in the blank space of sentence;
Air is ________
(a) Translucent
(b) Transparent
(c) Transduction
(d) all the above
Answer :- b)Transparent
Explanation: – air contains mixture of lots of gases, but it is transparent because we can see through it most of the time clearly.
(4) Which of the following gases are present in air?
(a) nitrogen
(b) oxygen
(c) carbon dioxide
(d) all the above
Answer: – d) all the above
Explanation: -nitrogen, oxygen and carbon dioxide and many other gases, together form air.
(5) Which of the following is known as thin layer of gases?
(a) atmosphere
(b) water
(c) dust
(d) none of these
Answer: -a) Atmosphere
Explanation: -thin layer of gases surrounded by earth is called atmosphere while water and dust is not thin layer of gases.
(6) Which of the following situation will happen if there is no air in earth?
(a) plant would be die
(b) animal and fish would be die
(c) sunburn
(d) all the above
Answer: -d)all the above
Explanation: -No air means No breathing, and breathing is very much important for everyone on the earth. Breathing leads to supply of oxygen to the every living cell of the living organisms. Even the plants need carbon dioxide present in the air for the respiration process. No air on the earth will cause all of the above plants, animals and fishes can die without respiration.
(7) Which of the following statement is incorrect about air?
(a) Air is present everywhere
(b) Air do not present in soil
(c) air occupies space
(d) air is a transparent
Answer: -b) air do not present in soil
Explanation: -all the statements are correct except air do not present in soil. Air is also present in the soil, and plants get it through the roots.
(8) Which of the following gases, in the atmosphere is essential for photosynthesis?
(a) nitrogen
(b) sulphur
(c) carbon dioxide
(d) oxygen
Answer: -c)carbon dioxide
Explanation:- plant use Co2 gas; present in atmosphere for the process of photosynthesis. While they also use O 2 but little amount.
(9) Which is the process used for the balance of oxygen and carbon dioxide in atmosphere is maintained?
(a) Respiration
(b) photosynthesis
(c) both a and b
(d) Transpiration
Answer:- c) both a and b
Explanation:- During the process of photosynthesis plant is consume a Co2 and release O2 and this O2 is consuming by both human and animal during the process of respiration and Co2 is released In air so, in this way O2 and Co2balance is maintained in the atmosphere by respiration and photosynthesis.
(10) Which of the following organism is responsible for increasing the level of the oxygen in atmosphere?
(a) human
(b) birds
(c) plant
(d) all the above
Answer: – c) plant
Explanation: -plant released oxygen in atmosphere during the process of photosynthesis, so that is only we can say plant producesoxygen.
(11) What is the percentage of nitrogen and oxygen in the air?
(a) 1%
(b) 100 %
(c) 99%
(d) 5%
Answer :- c) 99%
Explanation: – nitrogen and oxygen is most abundant gases in the air, air contain 99% of nitrogen and oxygen while 1% is constituted by carbon dioxide and other gases.
(12) Which of the following gases do not support a burring process?
(a) oxygen
(b) nitrogen
(c) both a and b
(d) none
Answer: – b) nitrogen
Explanation: – nitrogen is a major part of air and it does not support a process of burning while oxygen is supported.
(13) Air present ______ around us.
(a) somewhere
(b) Every where
(c) only in water
(d) Only in soil.
Answer :- b) every where
Explanation: – air not only present in soil and water but it is present everywhere around us.
(14) Which of the following statement is true about windmills?
(a) They are used to generate electricity
(b) It is used to draw water from tube wells and to run flour mills.
(c) both (a) and (b)
(d) none of these
Answer:- c) both (a) and (b)
Explanation: – both of the above statements are true about windmills.
(15) Which gas in the atmosphere is found in less abundance?
(a) oxygen
(b) nitrogen
(c) Co2
(d) all the above
Answer:- c) Co2
Explanation: -carbon dioxide is less quantity in atmosphere while oxygen and nitrogen are most abundance.
(16) Which of the following gas is carried by the mountaineers with them?
(a) carbon dioxide
(b) oxygen
(c) nitrogen
(d) hydrogen
Answer:- b) oxygen
Explanation:- Air level is decreased with altitude, so the oxygen needed for breathing also decrease and become difficult to breath, hence mountaineers carry oxygen cylinders with them.
(17) Which of the following statement is correct?
(a) air helps in the dispersal of seed
(b) air play important role in water
(c) air helps in the dispersal pollen of flowers of several plants
(d) all of these
Answer:- d) all of these
Explanation: – All the statement about the air are correct.