Environmental Science
When the air temperature increases, the saturation vapour pressure will:

Vary over an increasingly broad range of values
Increase
Decrease
Remain the same

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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:

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

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Environmental Science
A food web is

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

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