Midlatitude deserts and steppes form because ________
A) they are in high mountains
B) they are in the interiors of continents
C) they form at middle latitudes everywhere
D) subsiding air masses are associated with high pressure
E) rising air masses are associated with low pressure
B
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If you look at beach sand under a magnifying glass, what do you see?
a) Quartz grains b) Shell fragments c) Coral reef debris d) Whatever sand-sized particles are available from the local environment e) Mud
Needleleaved trees survive long cold winters, low humidity and frozen soil because the leaves have low surface area in relation to their volume, and they are covered with a waxy coating to reduce water loss
Indicate whether the statement is true or false.
The precautionary principle is used to
A. restrain certain actions that might result in irreversible damage to the global environment. B. specify in advance the best available technology to be used to monitor the environmental consequences of a particular action. C. determine the amount of ground water in a given aquifer prior to extraction for use by industry or agriculture. D. ensure compliance with NEPA provisions.
If the half-life of carbon-14 is about 5,700 years, then of a given starting quantity, after 22,800 years (four half-lives), what fraction of the original amount will be left?
A. none B. 1/8 C. 1/4 D. 1/16