Environmental Science
The concept that 'population tends to increase geometrically while food supply increases arithmetically' was put forward by

Thomas Malthus
Stuart Mill
Adam Smith
Charles Darwin

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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:

Release of latent heat to the atmosphere when polar ice melts
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

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Environmental Science
Suppose yesterday morning you noticed ice crystals (frost) on the grass, yet the minimum temperature reported in the newspaper was only 35o F. The most likely reason for this apparent discrepancy is that:

The thermometer was read incorrectly
Temperature readings are taken in instrument shelters more than 5 feet above the ground
The thermometer was in error
The thermometer was read before the minimum temperature was reached for that day
The newspaper reported the wrong temperature

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