Question

explaining how to determine absolute age
use the drop - down menus to complete the paragraph.
geologists determine absolute age by comparing the amounts of radioactive and nonradioactive elements in
rock. the radioactive, or, elements decay into nonradioactive elements. because this
rate of decay is for each element, geologists can compare the amounts of stable and unstable elements
to determine how much of the elements have formed over time.

Explanation:

Geologists use radioactive dating. Radioactive (unstable) elements decay at a constant rate. By comparing stable (non - radioactive) and unstable (radioactive) elements in a rock, they can determine the age.

Answer:

1. igneous (Igneous rocks are commonly used for absolute age dating as they form from magma and have minerals with radioactive isotopes)
2. unstable (Radioactive elements are unstable)
3. constant (The rate of radioactive decay is constant for a particular element)
4. stable (They compare the amounts of stable (non - radioactive) elements formed from the decay of unstable ones)