Question

The Troposphere contains:

Answer 1

The troposphere contains almost all the atmospheric water vapour, in fact it contains about 70 to 80 per cent of the total mass of the Earth's atmosphere and 99 per cent of the water .

Answer 2

The troposphere contains about 75% of all of the air in the atmosphere, and almost all of the water vapour (which forms clouds and rain). The decrease in temperature with height is a result of the decreasing pressure. If a parcel of air moves upwards it expands (because of the lower pressure). When air expands it cools. So air higher up is cooler than air lower down.

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