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
Convection from a hot surface
Conduction of heat upward from a hot surface
Heat energy from the earth's interior

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Environmental Science
A food web is

A set of interconnected food chains, illustrating the tropic relationships among species
The set of prey species that are consumed by animals in an ecosystem
The tropic (feeding) levels that can be observed in an ecosystem
Like a food chain

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