Environmental Science
Suppose last night was clear and calm. Tonight low clouds will be present. From this you would conclude that tonight's minimum temperature will be:

Higher than last night's minimum temperature
Lower than last night's minimum temperature
The same as last night's minimum temperature
Above freezing

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

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

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