Environmental Science
Thermal belts are:

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

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Environmental Science
The aurora is produced by:

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

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