Environmental Science
When clouds are viewed near the horizon, the individual cloud elements usually:

Appear to have more vertical development than is actually the case
Appear farther apart than is actually the case
Appear closer together than is actually the case
Appear lighter in color than is actually the case

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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?

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

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