1) Archeologists have found fossil remains of some of the first land animals in layer C. It has been suggested that C-14 be used to data the
fossils. Some archeologists have objected and suggested that it would
be best to use U-238 or Pb-206 to date the rock layer instead. Why
would they make such a suggestion?
A)
Rocks do not contain any elemental carbon for
radiometric dating purposes.
B)
Carbon-14 is only found in living things; it can only
be used to date remains.
C-14 has a very short half-life, 5700 years, and based
C) on geologic history, layer C may be several million
years old.
C-14 has such a long half-Life, 570000 million years,
D) it would be more appropriate to use a radioactive
element with a shorter half-life.

a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be?

\

the arctic is a region of the planet, north of the arctic circle, and includes the arctic ocean, greenland, baffin island, other smaller northern islands, and the far northern parts of europe, russia (siberia), alaska and canada.

gravity

explanation: