10 Question-Answer on Earth’s atmosphere 1. The earth is surrounded by atmosphere up to a height of about (a) 200 km (b) 400 km (c) 500 km (d) 600 km Ans: (b) 2. Clouds are contained in a layer from the earth’s surface, which is called (a) Troposphere (b) Stratosphere (c) Mesosphere (d) Ionosphere Ans: (a) 3. The density of air at the top of stratosphere in comparison to that of near the eart’s surface is (a) 10 -2 times (b) 10 -3 times (c) 10 2 times (d) 10 3 times Ans: (b) 4. The atmosphere between the heights of 50 km and 80 km is called (a) Mesosphere (b) Ozono...
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