The source region of the Great plains artesian system is located in
a)canada
b) the rocky mountains
c) the Appalachians
d) great lakes.
....
Long ridges produced along the leading edges of glaciers re called
a) erratic edges
b) terminal moraines
c) sand and rock tunnels
d) glacial dunes.
...
The salts in seawater were added to the oceans mainly by
a) landslides
b)rivers
c)salt mines
d)evaporation
...
When radioactive uranium decays, it changes into
a)lead
b)salt
c)copper
d)tin
...
the rate of radioactivity of uranium-238 can be speeded up by
a)heat
b)chemicals
c)pressure
d)none of these
....
the age of a sample of wood can be calculated by carbon dating to about
a)500 million years
b)100 years
c)4.5 million years
d)44,000 years
..
the rock type in which most fossils are found is
a)volcanic
b)igneous
c)metamorphic
d)sedimentary
.
fossils that are found useful in dating strata are called
a)easy fossils
b)true fossils
c)datum fossils
d)index fossils
2007-10-21
10:41:40
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2 answers
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asked by
rocker chick
2
in
Science & Mathematics
➔ Earth Sciences & Geology
please only answer the ones you can
dont try to guess
2007-10-21
10:42:01 ·
update #1