Review Exercise
A. Choose the correct option
. 1. The atmosphere extends to
(a) 2,000 km (b) 1,800 km above the Earth's surface. (c) 1,600 km (d) 1,400 kun 2. In the troposphere the temperature of air decreases with increase in height at the rate of 1 for every (a) 160 m (b) 165 m (c) 170 m (d) 175 m 3. Meteors burn in the (a) troposphere (b) stratosphere (c) mesosphere (d) thermosphere 4. Which of the following is not a greenhouse gas? (a) carbon dioxide (b) methane (c) nitrogen oxide (d) hydrogen 14
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Answer:
about 10 km (6.2 miles or about 33,000 feet) above sea level
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