Environmental Science
Thermal belts are:

Pockets of warm air resting on a valley during the afternoon
Cold, below-freezing air found at the top of a mountain
Warmer hillsides that are less likely to experience freezing conditions
Pockets of cold air resting on a valley floor at night

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Environmental Science
The primary cause of a radiation inversion is:

Infrared radiation absorbed by the earth's surface
Solar radiation absorbed by the earth's surface
Infrared radiation absorbed by the atmosphere and clouds
Solar radiation reflected by the earth's surface
Infrared radiation emitted by the earth's surface

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