Cold and cloudy nights are warmer than cold and clear nights (other factors being equal) because ____
A) of strong radiation inversions
B) clouds reflect sunlight
C) of thermal belts
D) clouds absorb outgoing infrared energy and radiate it back to the surface
D
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Air flows from ____
A)windy areas to non-windy areas B)low pressure areas to high pressure areas C)high pressure areas to low-pressure areas D)the right in the Northern hemisphere E)the top of the atmosphere to the bottom of the atmosphere
Primary air pollutants ____, whereas secondary pollutants _____
A) enter the atmosphere directly; form by chemical actions involving other pollutants B) form through a series of chemical reactions; occur naturally C) occur naturally; are synthetic D) enter the atmosphere directly; enter the atmosphere through human intervention
Why do leaders of some developing countries fear the loss of folk culture?
What will be an ideal response?
Which of the following is true regarding groundwater?
A) It is unlimited when compared with the amount of surface water supplies. B) When polluted, it is actually easier to clean up than is surface water. C) The total amount of groundwater has been reduced by the mining of water. D) In terms of total amount, it is second to streams in the United States.