Natural gas reserves in the United States ________
A) are larger than those of any other country
B) have been almost fully depleted, so the United States must import most of its natural gas
C) are expected to last at least another 70 years
D) are being replenished more quickly than they are being used
C
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On its way to Earth, the solar wind first encounters
A) the troposphere. B) the magnetosphere. C) the ozonosphere. D) Earth's surface. E) the homosphere.
A map of the ages of the sea floor shows ________
A) the direction of the plate motions B) how fast the plates are moving C) the location of modern plate boundaries D) how much material was produced at the ridges during a given period of time
________ is a substance significant to the atmosphere in that it is needed to make clouds, and is intimately involved in the place-to-place transfer of energy
What will be an ideal response?
What is NOT a characteristic of a mineral?
A. must be solid B. must be nonliving C. must be naturally found in nature D. must be made of only one element E. must have atoms forming a crystal pattern