What process gives trenches their unique arc-shaped depressions?
a. Spreading
b. Volcanic eruptions
c. Subduction
d. Turbidity
e. Erosion
c
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The fact that the trees in central Alaska look like the trees in western Siberia, despite being separated by thousands of kilometers, illustrates the theory of
A) convergent evolution. B) multiple origins. C) global dispersal. D) plate tectonics.
What geologic evidence can be found along the eastern margin of North America of the Triassic
breakup of Pangaea? What will be an ideal response?
How are added minerals most often found in soil?
A) in crystal form B) coated on fragments of existing materials C) clinging to roots of plants D) in veins or stripes of continuous crystals or powder
Sedimentary rock formed from dissolved minerals that precipitate out of water solution and build up to form rock are
A) clastic.
B) inorganic.
C) organic.
D) chemical.