Rifting in the Rio Grande Rift continues today at the rate of ____
A)2 mm per year
B)1 cm per year
C)2 cm per year
D)10 cm per year
E)2 m per year
A
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Which of the following is a chemical property of gold?
A) characteristic color B) electrical conductivity C) lack of reactivity D) None, they are all physical properties.
Desert ecosystems are fragile for which of the following two reasons?
A. frequent wildfire and flooding B. rapid nutrient cycling and frost damage C. slow plant growth and low species diversity D. overpopulation of predator species and drought E. off-road vehicle traffic and deep, organic soils
Why does an air parcel become cooler as it rises and expands?
A. The air pressure around the parcel increases as it rises. B. As molecules push outward to expand the parcel the parcel loses energy. C. Water vapour in the parcel evaporates as it rises. D. The density of the air parcel decreases as it rises.
The size and period of a wave is controlled by what three factors?
a. Wind speed, time wind has blown, tides b. Time wind has blown, fetch, tides c. Wind speed, time wind has blown, fetch d. Distance wind has blown, time the wind has blown, tides