Geologic Time

Question 1

How are eras and periods of the geologic time scale named?

Revolt · Accepted Answer

They are named for the places where geologists first described rocks or fossils from that time.

Question 2

oceansfossilsthe atmosphere

Revolt · Accepted Answer

fossils

Question 3

PrecambrianPaleozoicCenozoic

Revolt · Accepted Answer

Precambrian

Question 4

before after during

Revolt · Accepted Answer

after

Question 5

According to scientific evidence, Earth is approximately 4.6 [___] years old.

Revolt · Accepted Answer

⇒ billion: 139241; radioactive; billion

Question 6

Scientists used [___] dating to determine Earth’s age.

Revolt · Accepted Answer

radiometric

Question 7

1 2 3 4

Revolt · Accepted Answer

2; Selection 1: 2; Selection 2: 4; Selection 3: 1; Selection 4: 3

Question 8

1 2 3 4

Revolt · Accepted Answer

4

Question 9

1 2 3 4

Revolt · Accepted Answer

1

Question 10

1 2 3 4

Revolt · Accepted Answer

3

Geologic Time Answers