Match the following. Column A Column B (a) Aircraft fly in this region (i) Mesosphere (b) Temperature decreases with increasing altitude (ii) Troposphere (c) It extends from 90 km - 500 km (iii) Exosphere (d) It is the site where all weather takes place (iv) Stratosphere (e) It has very thin layer of air (v) Thermosphere

a-iv Stratosphere is the region where aircraft fly. Ozone layer is also present in this layer. b-i In mesosphere, the temperature decreases with increasing altitude. It is about 50 to 80 kilometers above the earth's surface. c-v Thermosphere extends from 90 km - 500 km. The space shuttles orbit in this region. d-ii Troposphere is the site where all weather changes take place. It is the lowest layer of the Earth's atmosphere. e-iii Exosphere has very thin layer of air. It is the outermost layer of the earth's atmosphere. Column A Column B (a) Aircraft fly in this region (iv) Stratosphere (b) Temperature decreases with increasing altitude (i) Mesosphere (c) It extends from 90 km - 500 km (v) Thermosphere (d) It is the site where all weather takes place (ii) Troposphere (e) It has very thin layer of air (iii) Exosphere

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Lakhmir Singh's SCIENCE FOR CLASS 5>Chapter 9 - Air and Water>Objective Type Questions>Q 1

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Give one word for the method used by residential colonies to clean water in overhead tanks _____. (Chlorination /Sedimentation /Distillation)

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Important Questions on Air and Water

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Lakhmir Singh's SCIENCE FOR CLASS 5>Chapter 9 - Air and Water>Objective Type Questions>Q 2

Match the following.

	Column A		Column B
(a)	Aircraft fly in this region	(i)	Mesosphere
(b)	Temperature decreases with increasing altitude	(ii)	Troposphere
(c)	It extends from 90 km - 500 km	(iii)	Exosphere
(d)	It is the site where all weather takes place	(iv)	Stratosphere
(e)	It has very thin layer of air	(v)	Thermosphere