Which of the following are tectonic settings in which regional mountain belts form?
A. continental collisions
B. mantle upwellings
C. subduction zones
D. All of these choices are correct.
Answer: D
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Much of the U.S. federal regulatory structure set up in the 1970s to protect the environment has been enforced by subsequent presidents.
Answer the following statement true (T) or false (F)
Pangaea is currently dated at
A) 4.6 billion years ago. B) 225 to 200 million years ago. C) 65 million years ago. D) the beginning of the Holocene. E) about half the timespan of Earth's existence.
In what way is the government of Canada similar to that of the United States?
A) Both countries have a federal system in which power is shared between the national, state, and local governments B) Both countries have a unitary system in which power is centralized in the national government C) Both countries have a parliamentary system in which the executive branch derives its power from the legislative branch of government D) There is little similarity because Canada is a constitutional monarchy
Steam power significantly diminished the ________, or the difficulty of moving from place to place
A) geography B) geographic impedance C) fuel price D) friction of distance