Humus ____
A)is the material always comprising the topmost soil horizon
B)is the dark, organic-rich material formed by bacterial decay
C)is also known as organic litter
D)always includes large amounts of sediments
E)forms from the chemical weathering of the parent rock
B
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You have the most characteristics in common with members of your own: a. class
b. species. c. kingdom. d. genus.
An episode of mountain building during which intense deformation takes place is known as a(n) ____________________
Fill in the blank(s) with correct word
Cloud-condensation nuclei over the ocean consist primarily of
A) clay particles. B) pieces of coral. C) salt particles. D) minute fragments of sea shells.
The white granite of the Idaho Batholith near Boise, Idaho, contains dark gray xenoliths of metamorphic material. Which is older? How do you know?
A) Granite; the principle of superposition B) Xenoliths; the principle of cross-cutting relations C) Granite; the principle of unconformities D) Xenoliths; the principle of inclusions