question 23 of 25\nhow is absolute dating used to find the ages of fossils?\na. it involves using index…

question 23 of 25\nhow is absolute dating used to find the ages of fossils?\na. it involves using index fossils and their locations in rock to estimate the ages of other fossils.\nb. it involves calculating the amount of a radioactive isotope in a sample and comparing it with the amount of a stable isotope.\nc. it involves comparing the amount of uranium - 235 in a fossil with the amount of carbon - 14 in the fossil.\nd. it involves using the principle of superposition to find the ages of fossils found in earths rock layers.

question 23 of 25\nhow is absolute dating used to find the ages of fossils?\na. it involves using index fossils and their locations in rock to estimate the ages of other fossils.\nb. it involves calculating the amount of a radioactive isotope in a sample and comparing it with the amount of a stable isotope.\nc. it involves comparing the amount of uranium - 235 in a fossil with the amount of carbon - 14 in the fossil.\nd. it involves using the principle of superposition to find the ages of fossils found in earths rock layers.

Answer

Brief Explanations:

Absolute dating uses radioactive decay. By calculating the ratio of a radioactive isotope to a stable isotope in a sample, the age of the sample (such as a fossil) can be determined. Option A is relative - dating using index fossils. Option C is incorrect as uranium - 235 and carbon - 14 are not compared in this way for dating. Option D is the principle of superposition which is for relative dating.

Answer:

B. It involves calculating the amount of a radioactive isotope in a sample and comparing it with the amount of a stable isotope.