One way of increasing our supplies of rare earth minerals is to ____.
A. import them from asteroids
B. extract and recycle them from discarded electronics
C. grow them chemically in a lab
D. require manufacturers to use a different material
E. buy more from China
Answer: B
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Limestone structures constructed in the marine environment by some skeletal material of living organisms are ____
a. evaporites b. clastic wedges c. mobile belts d. ophiolites e. organic reefs
In which bioregion does a prolonged summer-season drought bring a unique array of vegetation?
A) Mediterranean B) Tropical Rainforest C) Tropical Savanna D) Steppe E) Deciduous Forests
The main concern with a nuclear power plant is the danger of a __________ where heat builds up and causes an explosion, releasing dangerous radioactive compounds into the environment.
Fill in the blank(s) with the appropriate word(s).
High silica magmas have lower melting temperatures than low silica magmas.
Answer the following statement true (T) or false (F)