What causes seasons?
A) differences in the amount of daylight
B) the elliptical orbit of the earth
C) the changing tilt angle of the earth
D) seasonal changes in the angle of the sun above the horizon
E) none of the above
D
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The most common minerals in the Earth's crust are the ________.
A. silicates B. sulfates C. sulfides D. halides E. carbonates
The type of structure shown in this figure is a
A. reverse fault. B. dip-slip fault. C. strike-slip fault. D. normal fault. E. joint.
The economy of Turkmenistan rests largely on what energy export?
A) oil B) natural gas C) uranium D) coal E) hydropower
Earth's magnetosphere is generated by
A) nuclear fusion in Earth's core. B) nuclear fission in Earth's core. C) dynamo-like motions in Earth's interior. D) gravitational accretion.