An unknown type of igneous rock has the following characteristics: the rock is dark in color and composed of coarse mineral grains of pyroxene and olivine. Where did this rock likely form?
A. Below the surface near a mid-ocean ridge
B. At the surface near a mid-ocean ridge
C. Below the surface near a convergent plate boundary
D. At the surface near a convergent plate boundary
Answer: A
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A. 10 B. 7 C. 5 D. 4
Only a small percentage of earthquakes produce tsunamis. Indicate whether the statement is true or false
In 1995-1996, gray wolves were re-introduced to Yellowstone National Park. Since then, which of the following has occurred?
A. Scavengers are not able to find food. B. Beaver dams have disappeared from the streams. C. Elk have increasingly trampled regrowth of aspen, cottonwoods, and willow trees. D. The elk population has decreased. E. Coyote populations have decreased the number of small mammals.
The type of fault shown in this figure is a
A) dip-slip fault.
B) normal fault.
C) strike-slip fault.
D) reverse fault.