Eons, eras, Periods and

Epochs

POSTER #1

Solve the problem above then locate the poster with the correct answer in the upper right corner.

Stacking pennies with the oldest on the bottom, and the youngest on the top

demonstrates which law concerning rock layers?

The Fossil Record

POSTER #2

Looking at the bottom layer of this rock, what can you conclude about the land at the time?

Law of Superposition

POSTER #3

What determines the end of one era and the beginning of another?

The rock was once dry land before it was covered by

water.

POSTER #4

Look at the picture carefully, what principle is demonstrated by this picture?

The Geologic Time Line

POSTER #5

If a fossil of a land dwelling animal is found beneath a fossil of a water dwelling animal, what can you conclude about the rock in its

past?

EpochPOSTER #6

Which Layer is the oldest? Which is the newest?

The organisms found in the rock layers are marine animals, this rock was once covered with water.

POSTER #7

The main divisions of the Geologic Time Scale.

C,E POSTER #8

How have organisms changed as you go up the rock layers?

Meteor impact or climate change

POSTER #9

What evidence have scientists found that tells of a mass

extinction?

MesozoicPOSTER

#10

What is the largest division of time on the GTS?.

Principle of Uniformatarianism

POSTER #11

When organisms no longer exist on earth.

EonsPOSTER

#12

A record of the fossils found .

They have grown more

complex

POSTER #13

What Principle states that geologic process have not changed over the years?

Way too many years.

POSTER #14

The smallest unit of geologic time is called an

Original HorizontalityPOSTER

#15

Why don’t scientist use years and decades to measure the

Earth’s history?.

A drastic change in the fossil record

POSTER #16

The era in which the dinosaurs lived is the..

ExtinctPOSTER

#17

What is believed to have caused most extinctions?

Poster #18

A mass extinction of the dominant

organism found on earth at the time.

The __________ _______ _______ is a record of the life forms and geologic events in Earth’s history..

Answers

• 1 →3 8 →13 2→7• 3 →18 13→11 7→1• 18 →5 11→17• 5 →4 17→9• 4 →15 9→16• 15 →14 16→10• 14 →6 10→12• 6 →8 12→2