The innermost layer of the Earth, which is composed of iron and nickel metal, is the ________
a. lithosphere
b. crust
c. mantle
d. core
d
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A group of organisms of the same species that occupy a specific area is called a(n) ____
A) community B) population C) ecosystem D) niche
Why has Southeast Asia emerged as a major center of the global sex trade, and what problems does this cause for the region?
What will be an ideal response?
An example of land use planning is a floodway. What is a floodway?
A) The areas near a river that are developed with buildings, but far enough away from the river to avoid damage during a flood. B) Areas along a stream or river that are developed, and the buildings sustain flood damage during bad floods. C) Areas of little or no development alongside a stream that are wide enough and low enough to carry the predicted discharge of the 100-year flood. D) Both B and C.
What event was a major factor in the development of the fertile soils of the upper Midwest and Northeast United States?
A) glaciation B) volcanic eruptions C) tectonic forces D) erosion by meandering rivers