Environmental Science
Thermal belts are:

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

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Environmental Science
Our seasons are caused by:

Only (b) and (c) are correct
The length of the daylight hours
The angle at which sunlight reaches the earth
The changing distance between the earth and the sun
All of these

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Environmental Science
The order of basic processes involved in succession is

Nudation->Invasion-> competition and co action->reaction>stabilization
Invasion->stabilization-> competition and co action->Reaction>nudation
Nudation->stabilization-> competition and co action->Invasion>reaction
Invasion-> Nudation->competition and co action->Reaction>stabilization

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