Scientists have direct evidence of the Earth's structure to

A) the inner core.
B) the upper mantle (~250 km (155 mi)).
C) about 2 km (1.2 mi) from the surface.
D) 10 km (6 mi) from the surface, based on the deepest well shaft.


C

Environmental & Atmospheric Sciences

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By the end of the twentieth century changes in urban structure in the United States meant that most of the largest cities in the United States were located in ________

A) The Northeast B) The Sunbelt C) The Northwest D) The Great Plains

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An igneous rock that cools deep inside the Earth is called a(n) ________ igneous rock

Fill in the blank(s) with correct word

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What is the driving force behind ridge push?

A. Gravity B. Temperature C. Radioactivity D. Pressure

Environmental & Atmospheric Sciences

Which statement about the IPCC findings is accurate?

A. It establishes a high degree of certainty in the results. B. It proves beyond a shadow of a doubt that global warming is caused by humans. C. It proves beyond a shadow of a doubt that global warming is natural. D. It shows how a bunch of scientists have found a way to keep getting funded to do bogus research.

Environmental & Atmospheric Sciences