Isotopes of the Same Element Have Different Numbers of Neutrons

Q3: The Earth is approximately _ years old.<br>A)

Q4: The Earth's largest mass extinction coincides with

Q5: The relative-dating principle of _ states that

Q6: Our ability to assign an age to

Q7: In radioactive decay a(n) _ emission is

Q9: _ are subdivisions of eras.<br>A) Ages<br>B) Intervals<br>C)

Q10: A(n) _ fossil is a fossil from

Q11: _ denotes the vast amount of time

Q12: The _ Era is the Age of

Q13: So far, the oldest mineral found on