Environmental Science
The atmosphere near the earth's surface is "heated from below." Which of the following does not significantly contribute to this heating?

Conduction of heat upward from a hot surface
Convection from a hot surface
Absorption of infrared energy that has been radiated from the surface
Heat energy from the earth's interior

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Environmental Science
The order of succession in a hydrosere is

phytoplankton->Rooted aquatic plants->Free floating stage->Reed swamp stage->Sedge Meadow stage-> wood land stage-> Climax forest
Rooted aquatic plants-> phytoplankton->Free floating stage->Reed swamp stage->Sedge Meadow stage-> wood land stage-> Climax forest
phytoplankton->Rooted aquatic plants->Free floating stage->Reed swamp stage-> wood land stage-> Sedge Meadow stage-> Climax forest
Rooted aquatic plants-> phytoplankton->Free floating stage-> Sedge Meadow stage-> Reed swamp stage-> wood land stage-> Climax forest

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Environmental Science
Thermal belts are:

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

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