The ________ describes the process in which this dominant greenhouse gas circulates among Earth systems.
A. helium cycle
B. calcium cycle
C. potassium cycle
D. carbon cycle
E. sodium cycle
Answer: D
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Net deposition of sediments results in a building up, or _______________, of the landscape
Fill in the blank(s) with correct word
If an air parcel is warmer than its surroundings, it is more dense and will thus sink
Indicate whether the statement is true or false
Judge the following sentence according to the criteria given below: Water is able to dissolve nearly everything BECAUSE water molecules interact with other water molecules and other polar molecules
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
America first appeared by name on a map in ______.
A ) 700 BC B ) 588 AD C ) 1492 D ) 1507