Which of the following is NOT accurately dated at between 4 and 4.6 billion years old?
A. the oldest dates on mineral grains on Earth
B. isotopic ages on Earth's oldest known fossil shell
C. age of the oldest meteorites
D. age of moon rocks returned to Earth and dated
Answer: B
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Most ocean surface currents are due to
A) melting polar glaciers. B) river flow into the ocean. C) global winds. D) local winds.
Most tropical beaches undergo seasonal transformations Indicate whether the statement is true or false
In the case study “Desert Debris Flows and Housing on Alluvial Fans—Tucson, Arizona, 2006,” why did the hydrograph for Sabino Creek show higher and higher discharge rates between July 27 and July 31?
What will be an ideal response?
What is meant by the term surf zone?
A. Zone of breaking waves B. Zone affected by tides C. Zone between high and low tide D. Zone above high-tide level