Define the geologic time scale and explain why geologists use it to show earth’s history.

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

What enzyme is most important for dna replication and why?

Which of the following human activities resulted in the growth of the north american deer population?