According to the theory of isostasy, mantle rocks over long periods of time behave as:
a. plastic material
b. viscous material
c. elastic material
d. brittle material
b
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Plants that are allelopathic
A) have very sharp spines instead of leaves. B) cannot tolerate long periods of drought. C) produce flowers very rapidly after a rain event. D) are likely to be located away from other plants.
The most common ice crystal shape is
a. graupel. b. dendrite. c. rime. d. virga. e. a pentagon.
The temperate broad-leaved forest has become the most supportive of human occupation of any major biome.
Answer the following statement true (T) or false (F)
What is a rem?
A. Rem stands for Rapid Electron Motion. B. Rem is an '80s rock group. C. A rem is the maximum exposure limit for occupational safety. D. A rem is a unit for measuring radiation exposure. E. A rem is the number of radiation particles absorbed per second.