Geology questions. Help need please!?

[kolorlover]

High levels of SO4 around a gas plant were coming either from local tills or sulfur extracted from sour gas. They mystery was solved using:

a) numerical modeling
b) sulfur isotopes
c) trace element analysis
d) near-surface geophysics

What is the main way a slump differs from debris flow?
a) in one material is dry, in other there is water content
b) in one moving mass maintains integrity, in other shearing occurs throughout.
c) one consists of coarse grained sediment, other fine grained.
d) one occurs at creep rates, the other moves visibly

Which is true about one hundred year flood?
a) it lasts 100 years
b) it has a probability in any given year of 1%
c) it occurs every 100 years
d) occurs more often than every 100 years
e) occurs less often than every 100 years

Relative to braided stream, a meandering stream
a) has less bedload
b) has coarser bedload
c) has more discharge
d) has a steeper gradient
e) has less stable banks