This figure shows the main subdivisions of the geologic timescale. Which of these is the Cenozoic?
A. A
B. B
C. C
D. D
Answer: A
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Judge the following sentence according to the criteria given below: The temperature and moisture effects on air density commonly work together, because warm air can hold more moisture than cold air
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct but the reason is incorrect. D) The assertion is incorrect but the reason is correct. E) Both the assertion and the reason are incorrect.
The soil-forming factor that has the greatest effect in differentiating soil at the global-regional scale is ____
a. parent material b. land surface configuration c. climate d. vegetation type
Global warming threatens coral reefs because
A. warm temperatures prevent corals from hunting for food. B. warm temperatures cause the shells of corals to dissolve. C. the bacteria that cause coral bleaching thrive when temperatures are warm. D. corals eject the dinoflagellates that live within their tissues when seawater temperatures are too high.
The two main portions of the solar spectrum which enter the atmosphere are
A) X-rays and visible light. B) infrared and gamma rays. C) visible and infrared energy. D) ultraviolet and visible light. E) Gamma rays and X-rays.