Environmental Science
The wind-chill factor:

Takes into account humidity and air temperature in expressing the current air temperature
Determines how low the air temperature will be on any given day
Tells farmers when to protect crops from a freeze
Relates body heat loss with wind to an equivalent temperature with no wind
Indicates the temperature at which water freezes on exposed skin

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Environmental Science
Thermal belts are:

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

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