Paleomagnetic evidence has provided support of the ideas that:
a. new oceanic crust is created at mid-oceanic ridges and moves outward from the ridges
b. mountain ranges have low-density roots
c. the outer part of the earth's core is liquid
d. none of the above
a
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The meanings that people give to places are based only on our personalities and what we experience through our senses
Indicate whether this statement is true or false.
Acid precipitation
A) reaches lakes and rivers primarily by leaching through soil. B) is less of a problem downwind of areas that burn large amounts of coal. C) is caused by only one compound. D) is less of a problem in Scandinavia than in northern Canada.
In order for a particular type of material to be classified as a mineral, it must ________.
A. be a solid B. have a crystalline structure C. have a definite chemical composition D. occur naturally E. All of the answers are correct.
Pelagic sediment could be composed of
A. volcanic ash B. fine-grained clay C. skeletons of microscopic organisms D. All of these choices are correct.