Environmental Science
Frost forms when:

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

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Environmental Science
Which of the following helps to explain why even though northern latitudes experience 24 hours of sunlight on June 22, they are not warmer than latitudes further south?

All of these
Solar energy is used to melt frozen soil in the northern latitudes
Solar energy is spread over a larger area in northern latitudes
Some of the sun's energy is reflected by snow and ice in the northern latitudes
Increased cloud cover reflects solar energy in the northern latitudes

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