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

Environmental & Atmospheric Sciences

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An episode of mountain building during which intense deformation takes place is known as a(n) ____________________

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences

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.

Environmental & Atmospheric Sciences

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

Environmental & Atmospheric Sciences

You have the most characteristics in common with members of your own: a. class

b. species. c. kingdom. d. genus.

Environmental & Atmospheric Sciences