1) Which is the densest layer of atmosphere? a) Trophosphere b) Mesosphere c) Thermosphere d) Stratosphere 2) What lies above the layer of trophosphere whiich is calm and clear air? a) Stratosphere b) Exosphere c) Thermosphere d) Mesosphere 3) Name the layer where meteors burn up a) Trophosphere b) Mesosphere c) Thermosphere d) Stratosphere 4) Tropopause is a line of separation between which two layers a) stratosphere and mesosphere b) mesosphere and thermosphere c) trophosphere and thermosphere d) trophosphere and stratosphere 5) Name the rays of the sun which can cause skin cancer and allergies a) Ultraviolet rays b) Ion particles c) Radiowaves d) Dust particals 6) _______ is a special form of oxygen found in stratosphere a) Water Vapour b) Dust Particles c) Ozone d) Ultraviolet waves 7) _______ enables wireless communication over the earth's surface a) Thin air b) Ion particles c) Radiowaves d) Thin gases 8) What contributes to easy flying conditions in stratosphere a) Visibility b) Clouds c) Water vapour d) Dust particles 9) _______ known as shield over earth's surface a) Tropopause b) Ozone c) Ionosphere d) Mesosphere 10) _______ is a cold layer where temperature decreases with increasing altitude a) Atmosphere b) Tropopause c) Lithosphere d) Mesosphere

LAYERS OF ATMOSPHERE

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