Environmental Science
Frost forms when:

All of these
Objects on the ground cool below the dew point temperature.
The dew point is 32oF or below.
Water vapor changes into ice without first becoming a liquid.

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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
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
Conduction of heat through the interior of the earth

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Environmental Science
In the food relationship where the lion eats the wild beast, and the wild beast eats plants

The lion is the predator and the wilde beast is the prey
The lion is the primary consumer and the wilde beast is the secondary consumer
The lion is the secondary consumer and the wilde beast is the primary consumer
The lion is the prey and the wilde beast is the predator

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