What two methods are used for determining the age of rocks and fossils?
A.
Relative and Absolute Dating
B.
Absolute and Resolute Dating
C.
Carbon and Water Dating
D.
Relative and Absent Dating
5 answers
A. Relative and Absolute Dating
Which is true about relative dating?
A.
Relative dating uses the half-life of isotopes to get the exact age of a rock or mineral.
B.
Carbon-14 dating is used on rocks and minerals that are relatively young.
C.
Potassium –Argon dating is used on very old rocks and minerals.
D.
The law of superposition is used to determine a rocks relative age.
Back
Select an answer
A.
Relative dating uses the half-life of isotopes to get the exact age of a rock or mineral.
B.
Carbon-14 dating is used on rocks and minerals that are relatively young.
C.
Potassium –Argon dating is used on very old rocks and minerals.
D.
The law of superposition is used to determine a rocks relative age.
Back
Select an answer
D. The law of superposition is used to determine a rock's relative age.
What is "half-life"?
A.
The length an organism lived in prehistoric times.
B.
The time it takes for the radioactivity of a specific isotope to fall to half its original value.
C.
Half the life of an organism.
D.
The time it takes for a geologist to determine the age of a rock or mineral.
A.
The length an organism lived in prehistoric times.
B.
The time it takes for the radioactivity of a specific isotope to fall to half its original value.
C.
Half the life of an organism.
D.
The time it takes for a geologist to determine the age of a rock or mineral.
B. The time it takes for the radioactivity of a specific isotope to fall to half its original value.