What causes most places on Earth to have seasons?
a) Earth is closer to the Sun in the Northern Hemisphere summer and farther away in the Northern Hemisphere winter.
b) The spin axis is tilted 23.5. degrees to the plane of Earth's orbit, causing solar radiation to vary in angle as Earth revolves around the Sun.
c) The spin axis changes with tilt, causing winter when the tilt is great and summer when the tilt is small.
d) Days are longer during summer than winter, so the extra sunshine causes it to be warmer in summer and less sunshine causes it to be colder in winter.
e) There is more ice in winter, so it is colder, and less in summer, when it is warmer.
B
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Which of the following does not affect the potential hazards of a shoreline?
A) Elevation of the land surface near the shore B) The distribution of hard and soft rocks C) Width of a beach D) The presence of offshore islands and sand bars E) All of these affect potential hazards of shorelines.
Reconstruction of Paleozoic paleogeography is well documented by magnetic stripe data from rocks 600 to 250
million years old on the ocean floor. a. True b. False
What features would you look for to see if a metamorphic rock had undergone lithostatic or
differential pressure? What will be an ideal response?
The two types of body waves are ____and ____ waves
A)Raleigh; Love B)focal; distal C)primary; secondary D)tensional; extensional E)compressional; extensional