The primary method of erosion in arid regions is ____
A)wind
B)water
C)frost wedging
D)ventification
E)sedimentation
B
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Ethylene has the formula C2H4. Which of the following is a correct description of ethylene?
A) Ethylene has only single bonds. B) Ethylene has one double bond. C) Ethylene has one triple bond. D) None of these is correct.
The density of Earth materials ________ as the core is approached.
A. decreases then increases B. remains the same C. decreases D. increases E. increases then decreases
Evaporite deposits are important sources of ________.
A. sand and sandstone B. lead and tin C. iron and aluminum D. copper and zinc E. gypsum and halite
Tidal power generation would be possible along most coastlines but is not being practiced now mainly because of scenic considerations.
Answer the following statement true (T) or false (F)