Which physiographic region is both geologically ancient and rich in minerals
A. Canadian Shield
B. Hudson Bay Lowlands
C. Great Plains
D. Volcanic Islands
Ans: A. Canadian Shield
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Chlorofluorocarbons are compounds that were not appreciably present in the atmosphere before 1950 and have a significant role in catalyzing decomposition of stratospheric ozone
Indicate whether the statement is true or false
The recent surge in growth in the mining sector is largely due to increased trade with which nation?
A) China B) United Kingdom C) United States D) Japan E) New Zealand
What can you conclude by comparing the left and right hydrographs, each of which depict the same amount of time?
A) The left diagram has a higher peak discharge.
B) The right diagram represents a quicker event, like a flash flood.
C) Neither graph shows a true flood.
D) None of these are correct.
Streams can lengthen their drainage courses by the process of headward erosion
Indicate whether the statement is true or false