Geologic Time Scale Lesson 1 Chapter 12

Multiple Choice

Why is the geologic time scale important for understanding Earth's history?

• It helps scientists organize Earth's history and major events.

• It predicts future geological events.

• It only records the history of human civilization.

• It is used to measure the age of individual rocks.

Multiple Select

Which of the following statements about the geologic time scale are correct?

• It is a record of how Earth and its life forms have changed over time.

• It begins when Earth formed 4.6 billion years ago and goes to the present.

• It is divided into years and centuries.

• It shows when life first appeared on Earth.