Radiocarbon dating is useful in dating an event that occurred in the past ________ years.
A. 400 thousand
B. 40 thousand
C. 4 thousand
D. 40 million
E. 4 million
Answer: B
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Is the rate of Earth's rotation increasing or decreasing?
A. It is increasing. B. It is remaining relatively steady. C. It is decreasing. D. It is increasing and decreasing in cyclic fashion.
The city of Mecca, Islam's holiest city is located in
a. Egypt. b. Saudi Arabia. c. Iran. d. Iraq. e. Israel.
The ________ Era began with the appearance of complex life, as indicated by fossils like trilobites.
A. Precambrian B. Cenozoic C. Paleozoic D. Quaternary E. Mesozoic
What could possibly trigger a more rapid rate of global sea level rise than at present?
A. Decreased fossil fuel combustion B. The switch to alternative energy sources C. Collapse of the ice sheets D. Increased coal mining