Which of the following does NOT determine whether a rock is an ore?
A. the grade of the ore
B. the type of ore, such as oxide versus sulfide types
C. the location of the deposit
D. size and depth of the mineral deposit
E. all of these factors determine whether a rock is an ore
Answer: E
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Midocean ridges are higher than surrounding oceanic crust primarily because
A) two plates are colliding. B) the crust is thicker and stronger. C) transform faulting uplifts the rocks. D) the lithosphere is thinner and hotter.
The current global human population is approximately ________
A) 1.5 million B) 7 billion C) 7 million D) 1.5 billion E) 10 billion
What does it mean to say that we are "fishing down the food chain"?
What will be an ideal response?
Which of the following is true of glacial movement?
A) The rate of surface motion is usually identical to the basal slip rate. B) The internal flow just below the surface is greater than the basal flow. C) All glaciers move just a few centimeters per year. D) The basal ice layer does not move downslope.