Humans have caused
A. the amount of carbon dioxide in the atmosphere to increase.
B. the amount of oxygen in the atmosphere to increase.
C. the amount of water in the global ocean to decrease.
D. All of the above.
Answer: A
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The Grenville orogeny was the culminating event of the amalgamation of Laurentia. Indicate whether the statement is true or false
The difference in elevation between high and low points in a region is called ____
A)relief B)relief angle C)angle of declivity D)slope E)slope angle
Limestone is a type of ________ rock that forms when ________
A) igneous; lava cools B) igneous; magma cools C) sedimentary; broken fragments of rock are deposited in a water environment and are then cemented together. D) sedimentary; calcium carbonate precipitates, or organic material containing calcium carbonate accumulates in a water environment
Which of the following is not an area thickly covered with loess?
A) Portions of Southern Africa B) Portions of the central United States C) Portions of eastern China D) Portions of Argentina E) Portions of Russia