The earth's atmosphere receives ________ of the sun's total energy output
a. about 25%
b. about 50%
c. a very small fraction
d. about 80%
c
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If we can't protect larger areas, which areas do conservation biologists believe we must quickly identify and protect?
A. biodiversity hotspots B. urban diversity centers C. biodiversity deserts D. grasslands
In developing countries, contaminated water is responsible for the deaths of more than 1.6 million people. Contributing to this problem is the use of
A) groundwater for consumption and the disposal of human sewage. B) groundwater for consumption and the disposal of human sewage in surface waters. C) surface waters for consumption and the disposal of human sewage. D) surface waters for consumption and the disposal of human sewage in groundwater.
The tail of a comma cloud is caused by a
A) cold front. B) warm front. C) occluded front. D) stationary front. E) dry slot.
Water has the highest heat capacity of all solids and liquids, except liquid ammonia.
Answer the following statement true (T) or false (F)