The friction layer usually extends upward to an altitude near ____ above the surface.?
a. ?100 m
b. ?200 m
c. ?1,000 m
d. ?1,500 m
e. ?2,000 m
ANSWER: c
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The majority of atmospheric ozone (about 97%) is found in the ____
A) thermosphere B) mesosphere C) stratosphere D) exosphere
The principle of relative age dating which can be used to determine when the river formed on the landscape is the principle of
A) crosscutting relations.
B) inclusions.
C) original horizontality.
D) superposition.
When the area of rotation of a mesocyclone decreases in size, its wind speed ________
Fill in the blank(s) with the appropriate word(s).
How do most of the heavier elements up to iron form in the Universe?
A. in the cores of protostars B. in supernova explosions C. by nucleosynthesis in the cores of massive stars D. in the original interstellar clouds