Why is potassium-argon dating least useful for sedimentary rock?
A) Sedimentary rocks are too rare.
B) Sedimentary rocks cannot be dated.
C) Metamorphic and igneous rocks outnumber sedimentary rocks.
D) Sedimentary rocks don't often contain potassium.
Answer: D
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Which of the following statements explains why the albedo of the moon is 7 percent?
A. 7 percent of the sunlight striking the moon is absorbed. B. 7 percent of the sunlight striking the moon is reflected. C. Only 7 percent of the sun's energy absorbed by the moon is emitted back to space. D. 93 percent of the sunlight striking the moon is reflected.
Which of the following is the cloud feature labelled C?
A. halo B. lenticular C. mammatus D. anvil
Bisphenol A (BPA), a common component of plastics in bottles and can liners
A) mimics estrogen and can potentially cause disruption of human reproduction and development. B) causes mutations similar to those caused by UV light and X-rays. C) has been tested by the European Commission and found safe for human consumption. D) has been withdrawn from manufacture and use in the United States.
Which term refers to the number of people per unit of arable land?
A. agrodensity B. physiological density C. antidensity D. arithmetic density