The strongest earthquakes occur primarily at _____.
a.)divergent boundaries
b.)transform boundaries
c.)subduction zones
d.)hot spots
Ans: c.)subduction zones
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The plate boundary on this figure is located between
A) A and B.
B) B and C.
C) C and D.
D) D and E.
E) There is not enough information to tell.
What is the primary reason an increase in glaciation on land would cause sea level to fall?
A) The temperature of the oceans decreases from cold glacial streams. B) An increase in snow cover causes the atmosphere to heat up, which causes more evaporation. C) Glaciers depress the land surface, which pulls sea level down with it. D) Glaciers tie up large volumes of water that would otherwise be in the sea.
The ________ of a radioactive material is the time it takes for a given amount of radioactive isotope to be reduced by half.
A. half-life B. atomic mass life C. nuclear magnetic life D. atomic life E. atomic spin life
The Earth is approximately ________ years old.
A. 4,500 to 4,600 B. 4,500,000,000,000 to 4,600,000,000,000 C. 4,500,000,000 to 4,600,000,000 D. 450,000 to 460,000 E. 4,500,000 to 4,600,00