AND THE MINISCULE AMOUNT THAT IS LEFT DOESN’T PROVIDE A RELIABLE M...
14, and the miniscule amount that is left doesn’t provide a reliable measurement of age. In
the case of older objects, other age-dating methods are available, methods which use
radioactive atoms with longer half-lives than carbon has.
Question 43:
This passage is mainly about ______.
A.
archeology and the study of ancient artifacts
B.
one method of dating old objects
C.
various uses for carbon
D.
the differences between carbon-14 and nitrogen-14
Question 44:
Which of the following is NOT true about carbon-14?
A.
It and nitrogen always exist in equal amounts in any substance.
B.
Its half-life is more than 5,000 years.
C.
It can decay into nitrogen-14.
D.
It is radioactive.
Question 45:
The word
“it”
in paragraph I refers to________.
A.
carbon dating
B.
the age
C.
any organic natural material
D.
archeology
Question 46:
The word
“underlying”
in paragraph I could best be replaced by _______.
A.
below
B.
requiring
C.
serving as a basis for
D.
being studied through
Question 47:
The word
“roughly”
in paragraph 2 is closest in meaning to________.
A.
precisely
B.
harshly
C.
approximately
D.
coarsely
Question 48:
The paragraph following the passage most probably discusses_____.
A.
what substances are part of all living things
B.
how carbon-14 decay intonitrogen-14
C.
why carbon-14 has such a long half-life
D.
various other age-dating methods
Question 49:
It is implied in the passage that
.
A.
carbon dating has no known uses outside of archeology
B.
fossils cannot be age-dated using carbon-14
C.
carbon dating could not be used on an item containing nitrogen
D.
carbon-14 does not have the longest known half-life
Question 50:
It can be inferred from the passage that if an item contains more carbon-14
than nitrogen-14, then the item is _______.
A.
not as much as 5,570 years old
B.
too old to be age-dated with carbon-14
C.
too radioactive to be used by archeologists
D.
more than 5.570 years old