Sect 4 and 5- Geologic Time and Early Earth Quiz

Question 1

Scientists divided the time between Precambrian Time and the present into four units of time or eras

Accepted Answer

False

Question 2

The earliest form of life known on Earth was

Accepted Answer

single-celled organisms

Question 3

The first step in developing the geologic time scale was studying rock layers and index fossil worldwide.

Accepted Answer

True

Question 4

According to scientists, both Earth and the moon are

Accepted Answer

about 4.6 billion years old

Question 5

The geologic time scale is record of the geologic events and the evolution of life forms as shown in the fossil record

Accepted Answer

True

Question 6

Which of the following is not an important part of Earth's second atmosphere?

Accepted Answer

helium

Question 7

After water vapor condensed to form rain and then gradually accumulated, which of the following was formed?

Accepted Answer

Earth's oceans

Question 8

Periods are subdivided into unit of geologic time called eras

Accepted Answer

False

Questions 8