Environmental Science
Which of the following has a wavelength shorter than that of violet light?

Green light
Infrared radiation
Red light
Ultraviolet radiation
Blue light

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Environmental Science
Although the polar regions radiate away more heat energy than they receive by insolation in the course of a year, they are prevented from becoming progressively colder each year by the:

Conduction of heat through the interior of the earth
The insulating properties of snow
Circulation of heat by the atmosphere and oceans
Concentration of earth's magnetic field lines at the poles
Release of latent heat to the atmosphere when polar ice melts

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