Cycles of Matter — Unit test

Question 1

Which correctly lists the three isotopes that geologists measure to determine the age of an organism’s remains?

Revolt · Accepted Answer

carbon-14, nitrogen, and carbon-12

Question 2

Which is one piece of information that fossils in samples from Earth’s crust reveal about Earth’s history?

Revolt · Accepted Answer

changes in climate

Question 3

Which evidence suggests that several mass extinctions have occurred during Earth's history?

Revolt · Accepted Answer

Many fossils of organisms that are no longer living have been discovered.

Question 4

Study the image about geologic time.

Revolt · Accepted Answer

Quaternary

Question 5

Which is a way that paleontologists have contributed to humans' understanding of the history of life?

Revolt · Accepted Answer

They grouped organisms by the period in which they existed.

Cycles of Matter — Unit test Answers