Environmental Science
If the amount of energy lost by the earth to space each year were not approximately equal to that received:

The length of the year would change
The atmosphere's average temperature would change
The sun's output would change
The mass of the atmosphere would change

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Environmental Science
During the winter solstice in the Northern Hemisphere:

The noon sun is overhead at 23.5o S latitude
All of these
At middle latitudes in the Northern Hemisphere, this marks the longest night of the year
Astronomical winter begins in the Northern Hemisphere

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