Environmental Science
Low clouds retard surface cooling at night better than clear skies because:

The clouds are better conductors of heat than is the clear night air
The water droplets in the clouds reflect infrared energy back to earth
The formation of the clouds releases latent heat energy
The clouds start convection currents between them
The clouds absorb and radiate infrared energy back to earth

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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?

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

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