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
Definition of ecosystem is

A community of organisms interacting with one another
The abiotic component of a habitat
The community of organisms together with the environment in which they live
The part of the earth and its atmosphere which inhibits living organisms

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Environmental Science
Ecology is

Integrates both social and natural sciences to help us understand how the earth works,
The science that studies the evolution of life,
The study of the relationships between organisms and their environment
The study of the environment in the absence of humans

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