An air mass stretches for ____ kilometers, forming an entire block of hot or cold air.

10-20

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20-30

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30-40

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40-50

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Solution

The correct option is A 10-20
Air around a large part of oceans or land gets heated up or cooled down. This large area of heated or cooled air, is called an air mass. Sometimes an air mass stretches for 10-20 kilometers, forming an entire block of hot or cold air.

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