Which of the following is the only description that does not describe magnetic reversals?
A. They are recorded in the ocean crust.
B. We are unsure why they occur.
C. They occur instantaneously.
D. They occur roughly every 500,000 to 700,000 years.
E. They are recorded in continental lava flows.
Answer: C
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Which zone is the deepest seabed zone?
a. Bathyal zone b. Hadal zone c. Littoral zone d. Abyssal zone
Wave-cut platforms along northern coastlines of North America and the Great Lakes are exposed as
the result of: a. rising sea level. b. sediment erosion. c. sediment deposition. d. isostatic rebound. e. falling sea level.
Since the 1970s, the overall trend in emissions of primary pollutants in the United States has ____
A) increased B) varied C) remained the same D) declined
What physical property denotes the color of a powdered mineral?
What will be an ideal response?