Environmental Science
The most abundant gases in the earth's atmosphere by volume are:

Oxygen and helium
Carbon dioxide and nitrogen
Oxygen and ozone
Oxygen and water vapor
Nitrogen and oxygen

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Environmental Science
Definition of ecosystem is

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

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Environmental Science
Which of the following is not a reason why water warms and cools much more slowly than land?

A portion of the solar energy that strikes water is used to evaporate it
Water has a higher heat capacity
It takes more heat to raise the temperature of a given amount of soil 1oC than it does to raise the temperature of water 1oC
Heat energy is mixed in a deeper layer of water
Solar energy penetrates more deeply into water

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