Is aging primarily an example of a physical or chemical change?
A. Aging cannot be classified as either a physical or chemical change.
B. Aging is an example of a physical change since it involves our physical bodies getting older each day.
C. Aging is an example of a chemical change involving the chemical reformation of our biomolecules.
D. None of the above is true.
Answer: C
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Midway Island, to the northwest of Hawai‘i, is also part of the Hawaiian chain and is believed to have been produced by the same hot spot. Midway is about 2430 kilometers (1510 miles) from the K?-lauea volcano on Hawai‘i. Use the average rate of plate movement you calculated in problem 2 to estimate the age of volcanic rocks you would expect to find on Midway Island.
What type of estuary has little vertical mixing?
a. Fjord estuaries b. Bar-built estuaries c. Tectonic estuaries d. Drowned river mouth estuaries
Wind speeds at the eye of a hurricane are relatively calm
Indicate whether the statement is true or false
The spectra of most stars are dark-line spectra because ________
A) elements in the Sun's outer atmosphere absorb in these dark-line bands, blocking the radiation in those bands B) electrons decaying to a lower energy state emit a photon at a fixed energy, leaving dark bands between the emissions C) elements in the Sun's outer atmosphere emit radiation between these dark bands D) elements in the earth's atmosphere absorb in these dark-line bands, blocking out the frequencies in the dark bands