Rocks of the continental crust contain different minerals and each mineral has its own melting point. If the minerals with the lowest melting temperatures are the only ones melted, this is referred to as
A. partial melting.
B. temporary melting.
C. complete melting.
D. subductive melting.
Answer: A
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Current U.S. Forest Service policy is to:
a. aggressively fight wildfires b. prevent all fires c. set controlled fires intentionally d. allow wildfires to burn, even in areas near buildings e. increase forest densities through planting programs
Which of the following describes the saturation vapour pressure over water when the air temperature is below freezing?
A. equal to the saturation vapour pressure over ice B. greater than the saturation vapour pressure over ice C. equal to zero D. less than the saturation vapour pressure over ice
Most warm desert biomes of the world are located
A) about 20 to 30 degrees latitude north or south of the equator. B) in Asia. C) along a coastline. D) along the equator.
The margins of glaciers are usually darker than the interior primarily because
A. the sides are moving faster than the interior of the glacier. B. shearing causes the ice to expel air and become darker. C. the sides have a higher concentration of rocks and other debris. D. glaciers are transparent so the underlying bedrock is visible. E. All of these choices are correct.