The edges of faults are rough and tend to stick together while the rest of the block is moving. the energy that would normally cause the blocks to slide past one another is being stored up. when the force of the moving blocks finally overcomes the friction of the rough edges at the fault zone, it unsticks, and the stored up energy is released. the energy radiates outward from the fault in all directions.
the energy that radiates outward from the fault in all directions is a(n)
a) volcano.
b) tidal wave.
c) aftershock.
d) seismic wave.

"1. it should be, it has been for about 20 years, and it's really not much different in the end than breeding animals to have particular traits. there are always concerns about genetically engineered animals/plants affecting the environment in unexpected negative ways, but i can't think of an example where the fears didn't turn out to be baseless.  

first, as you point out, it would be a great advance in pharmacology, to be able to tailor drugs and their doses to me. the pros involve better medical treatment. the cons involve privacy issues like insurance companies denying coverage to people with genetic risk factors. looking at dna markers wouldn't affect the frequency of genetic diseases, but it would allow detection of them earlier. and ok, actually i suppose that if people used this information to avoid having children with genetic diseases, some might decrease in frequency."

geologic time scale (for gradpoint) =)

answer: b

coz red blood cells marrow and circulates the body for 120 days.