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question 10
on average, for every 1 km of increase in altitude in the troposphere, a parcel of air will:
a warm by 6.5℃
b cool about 10℃
c rise during the day and fall at night
d cool about 6.5℃
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Explanation:

In the troposphere, the environmental lapse - rate is approximately 6.5°C per kilometer increase in altitude. This means air cools as altitude increases.

Answer:

D. Cool about 6.5°C