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Test: Air Around Us - Class 6 MCQ


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10 Questions MCQ Test Science Olympiad Class 6 - Test: Air Around Us

Test: Air Around Us for Class 6 2024 is part of Science Olympiad Class 6 preparation. The Test: Air Around Us questions and answers have been prepared according to the Class 6 exam syllabus.The Test: Air Around Us MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Air Around Us below.
Solutions of Test: Air Around Us questions in English are available as part of our Science Olympiad Class 6 for Class 6 & Test: Air Around Us solutions in Hindi for Science Olympiad Class 6 course. Download more important topics, notes, lectures and mock test series for Class 6 Exam by signing up for free. Attempt Test: Air Around Us | 10 questions in 15 minutes | Mock test for Class 6 preparation | Free important questions MCQ to study Science Olympiad Class 6 for Class 6 Exam | Download free PDF with solutions
Test: Air Around Us - Question 1

Which of the following processes need oxygen?

Detailed Solution for Test: Air Around Us - Question 1

Oxygen is necessary for combustion, respiration and oxidation.

Test: Air Around Us - Question 2

In which of the following air is not used?

Detailed Solution for Test: Air Around Us - Question 2

Air is not required for boiling water but required for inflating tyres, filling balloon and winnowing.

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Test: Air Around Us - Question 3

During rain, soil animals comes out from their burrows for

Detailed Solution for Test: Air Around Us - Question 3

During rain, soil animals come out from their burrows for respiration as their burrow is filled by water.

Test: Air Around Us - Question 4

The balance between carbon dioxide and oxygen is maintained by

Detailed Solution for Test: Air Around Us - Question 4

The balance between carbon dioxide and oxygen is maintained by photosynthesis and respiration in which carbon dioxide and oxygen is used and oxygen and carbon dioxide is produced respectively.

Test: Air Around Us - Question 5

Which of the following statements is true regarding the earth's atmosphere?

Detailed Solution for Test: Air Around Us - Question 5

The density of air decreases with an increase in altitude.

Test: Air Around Us - Question 6

Which of the following plays a very important role in the oxygen cycle?

Detailed Solution for Test: Air Around Us - Question 6

Plants play an important role in the oxygen cycle, as they release oxygen during the process of photosynthesis. Thus, they help in balancing the oxygen content in the atmosphere.

Test: Air Around Us - Question 7

Mountaineers carry oxygen cylinders with them because

Detailed Solution for Test: Air Around Us - Question 7

The density of air decreases with altitude, so the oxygen needed for breathing also decreases and becomes difficult to breathe. Hence, mountaineers carry oxygen cylinders.

Test: Air Around Us - Question 8

Which of the constituents of air on increasing, causes global warming?

Detailed Solution for Test: Air Around Us - Question 8

Carbon dioxide traps the reflected rays of the sun that fall on the earth's surface. This results in the increase of the earth's temperature, which is referred as global warming.

Test: Air Around Us - Question 9

Which of the following gases cause the harmful greenhouse effect?

Detailed Solution for Test: Air Around Us - Question 9

High levels of carbon dioxide in the atmosphere cause the harmful greenhouse effect.

Test: Air Around Us - Question 10

Breathing of air through our mouth is not hygienic because

Detailed Solution for Test: Air Around Us - Question 10

If we breathe air through our mouth, the dust particles present in the air may enter the lungs and cause harm. But if the nose is used for breathing, the hair present in the nose filters the air and prevents the dust particles from entering the lungs.

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