Environmental Science
Thermal belts are:

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

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Environmental Science
The aurora is produced by:

Burning oxygen caused by the intense sunlight at high altitude
Scattering of sunlight in the upper atmosphere
The combination of molecular and atomic oxygen to form ozone
Fast-moving charged particles colliding with air molecules
Reflections of sunlight by polar ice fields

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