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Any animal that eats other animals, living or dead, as a source of nutrients is a(n) ____.​

What is the possible cause of the end-Ordovician mass extinction?

To be called “life”, what two processes must be occurring?

A sudden appearance of new organisms in the fossil record is called the ______________ Explosion

No basement rock exists from the Archean or Proterozoic eons.

Which of the following best describes the movement along a divergent plate boundary?

Which division of Earth exists below the crust and above the core?​

During  ___________, soft-bodied organisms making up the Ediacaran fauna were fossilized in Australia.

​The three categories of rocks are classified by ____.

In a sequence of undisturbed sedimentary rocks, the oldest fossils will be ____.​