Hydrothermal deposits are predominantly composed of what type of ore minerals?
A. oxide
B. pegmatite
C. evaporite
D. sulfide
Answer: D
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A shale that is subject to metamorphism may become a slate
a. True
b. FalseEnvironmental science is a narrowly defined field of physical and biological sciences.
Answer the following statement true (T) or false (F)
How did the debris from the Gros Ventre Landslide of 1925 lead to another disaster in the same region in 1927?
A) Loose debris resulted in a mudflow. B) The mass movement of sediment contaminated drinking water. C) The debris blocked the river, creating a lake that later burst. D) The debris mixed with river water to create a lahar.
Judge the following sentence according to the criteria given below: Planktonic single-celled organisms that live in colder waters have more need for extensions to help them float near the surface BECAUSE the colder seawater has a higher viscosity
than warm seawater. A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.