Why is gabbro considered a coarse-grained mafic rock?
A) It contains a lot of silica.
B) It is extremely rare.
C) It contains a lot of feldspar.
D) It contains a lot of magnesium and iron.
Answer: D
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Strip farming is a type of soil conservation or quality management practice.
Answer the following statement true (T) or false (F)
The greatest worldwide use of water is
A) in irrigation. B) by industry. C) by human consumption. D) in washing and flushing toilets.
What term describes open fissures in the brittle surface ice of a glacier?
What will be an ideal response?
When water is pumped out of an unconfined aquifer through a well, a ________ often develops in the water table.
A. deflation structure B. thin film of pollution C. ground-water mound D. piercement structure E. cone of depression