An ion with a negative charge is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
anion
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A warming climate can lead to worldwide sea level change. This is an example of a(n) ____________ change in that it
can be measured all over the world Fill in the blank(s) with the appropriate word(s).
________ is/are biodegradable and known to have (a) short persistence time(s)
A) DDE B) Bt C) DDT D) PBDEs E) PCBs
Osteoporosis is associated with which of the following?
A) an improper Na+/K+ balance B) increased calcium buildup in the bones C) loss of calcium from the bones D) none of the above
If solar flares pose a danger to orbiting spacecraft and astronauts, how much warning is there for the danger?
A) The primary danger is from high energy particles that travel at the speed of the solar wind 500km/s, so there is ample warning of 3-5 days. B) The danger is primarily from emission of neutrinos, which move at just below the speed of light; hence the warning is only a few seconds after a feature is observed. C) There is no warning; the radiation arrives at the same time as the feature is observed because they all travel at the speed of light. D) The danger is from high energy particles moving thousands of km per second, so the warning is a few hours.