Environmental Science
An important reason for the large daily temperature range over deserts is:

The ozone content of desert air is very low
Dry air is a very poor heat conductor
The light-colored sand radiates heat very rapidly at night
There is little water vapor in the air to absorb and re-radiate infrared radiation
Free convection cells are unable to form above the hot desert ground

ANSWER DOWNLOAD EXAMIANS APP

Environmental Science
The atmosphere near the earth's surface is "heated from below." Which of the following does not significantly contribute to this heating?

Absorption of infrared energy that has been radiated from the surface
Conduction of heat upward from a hot surface
Convection from a hot surface
Heat energy from the earth's interior

ANSWER DOWNLOAD EXAMIANS APP