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Which factors add to the greenhouse effect and are caused by human activities? Check all that apply.
Answers:
a decrease in the amount of dust in the atmosphere
an increase in gases in the atmosphere that absorb heat
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The object of a person's ambition or effort; an aim or desired result.
Answer:
When the entire lake reaches 40 F, the surface water cools further, dropping below 40 F. Because this water is now less dense than the surrounding water, it will stay on the top and continue to cool. Once the surface water falls to 32 F, it freezes. The freezing then spreads downward into the lake and the ice thickens
Explanation: