It is possible to date the rocks by comparing the amount of specific radioactive isotopes they contain. Which of the statement is correct in this respect:
AOlder sediment layers did not have these radioactive isotopes
BOlder sediment layers have less amount of these radioactive isotopes as that of the young ones.
COlder sediment layers have equal amount of these radioactive isotopes as that of the young ones
DOlder sediment layers have greater amount of these radioactive isotopes as that of the young ones.
Correct answer
B. Older sediment layers have less amount of these radioactive isotopes as that of the young ones.
Explanation
Older sediment layers have less amount of these radioactive isotopes as that of the young ones. is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.