Why is metal shiny?
A. The electrons absorb each light wave.
B. The electrons emit light due to electronic excitation.
C. The loose electrons reflect most wavelengths of light.
D. The electrons transmit most wavelengths of light.
E. all of the above
Answer: C
Environmental & Atmospheric Sciences
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Heavy metals ________
A) are not harmful unless they are directly ingested B) become less hazardous over time as they degrade chemically C) become less hazardous after incineration D) are unregulated by the U.S. government E) bioaccumulate in animal tissues
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Bioaccumulation
What will be an ideal response?
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Surface seismic waves originate at the epicenter of an earthquake.
Answer the following statement true (T) or false (F)
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