Which numbered area on this geologic map of North America would contain the oldest rocks exposed at the surface?
A. 1, southern Alaska
B. 2, continental platform of west-central Canada
C. 3, continental shield of eastern Canada
D. 4, coastal plain along the Gulf Coast of the U.S.
Answer: C
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Even if global consumption could be held constant at 2016 levels, for most metals, present reserves are projected to last only a few decades.
Answer the following statement true (T) or false (F)
The Coriolis effect contributes to ________
A) a reduction in eutrophication B) global wind patterns C) an increase in eutrophication D) increased acidic deposition E) global warming
You are asked to do a field study of a region of the Midwest United States that is thought to have once been covered by a glacier. Which of the following observations about the area would help confirm the hypothesis that a glacier once covered this region? (Check all that apply.)A) Local topographic maps show several moraines in the area.B) Historical weather records indicate the area experiences heavy snowfalls during the winter.C) Many farmers report encountering a layer of unsorted, rocky till material when plowing their fields.D) The local bedrock is mostly composed of fine-grained sandstones.
What will be an ideal response?
Squall lines form most often ahead of a(n):
a. stationary front. b. cold front. c. warm front. d. occluded front.