Environmental Science
At night, low clouds:

Weaken the atmospheric greenhouse effect
Are often caused by the atmospheric greenhouse effect
Have no effect on the atmospheric greenhouse effect
Enhance the atmospheric greenhouse effect

ANSWER DOWNLOAD EXAMIANS APP

Environmental Science
Frost forms when:

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

ANSWER DOWNLOAD EXAMIANS APP