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The geological timescale

The geological timescale

Assessment

Presentation

Science

7th Grade

Practice Problem

Medium

NGSS
MS-ESS1-4, MS-LS4-1, MS-LS1-6

+2

Standards-aligned

Created by

Roxana Nicolae

Used 59+ times

FREE Resource

4 Slides • 20 Questions

1

The geological timescale

Slide image

2

Multiple Choice

How old is the Earth?

1

approximately 2.5 million years old

2

approximately 4.6 billion years old

3

156000 years old

4

4.8 million years ol

3

Open Ended

What are the names of the layers of the Earth?

4

Multiple Select

This layer is made of molten iron and nickel.

1

outer core

2

crust

3

inner core

4

mantle

5

Multiple Select

Scientists were able to estimate the age of the Earth by studying:

1

trees

2

the stars

3

fossils

4

rocks

6

7

Multiple Choice

The biggest time period into which scientists have divide the time between the formation of the Earth and now is called:

1

periods

2

epochs

3

eons

4

eras

8

Multiple Choice

Question image

Look at the diagram.

What are eons divided into?

1

eras

2

epochs

3

periods

9

Multiple Choice

Question image

Look at the diagram.

Which era do we live in?

1

phanerozoic

2

neogene

3

cenozoic

10

Multiple Choice

Question image

Look at the diagram.

How long ago did the Mesozoic era begin?

1

542 million years ago

2

250 million years ago

3

65 million years ago

11

Multiple Choice

Question image

In which era did the Carboniferous period occur?

1

Paleozoic

2

Cenozoic

3

Mesozoic

12

13

Open Ended

Why is it useful to divide the Earth's history into eras and periods?

14

Multiple Choice

Question image

Which eon does not have any fossils?

1

the Hadean eon

2

the Archaen eon

3

the Proterozoic eon

4

the Phanerozoic eon

15

Multiple Choice

What important event marks the start of the Archaen eon?

1

the appearance of dinosaurs

2

the formation of the moon

3

the cooling of the crust

16

Multiple Choice

Question image

In which eon did photosynthetic organisms appear?

1

Hadean

2

Archaen

3

Proterozoic

4

Phanerozoic

17

Multiple Choice

Question image

This means visible life:

1

Hadean

2

Archaen

3

Proterozoic

4

Phanerozoic

18

Multiple Choice

In this eon, many big animals lived and still live (dinosaurs, newts, humans, etc). This is called the ... eon.

1

Hadean

2

Archaen

3

Proterozoic

4

Phanerozoic

19

Multiple Choice

The first three eons, the Hadean, Archaen and Proterozoic make up the:

1

Mesozoic

2

Cenozoic

3

Pre-cambrian period

4

Cambrian period

20

Multiple Choice

Question image

The Cambrian explosion was:

1

an explosion of asteroids that destroyed all life on Earth, including dinosaurs

2

a huge volcanic eruption that destroyed all life on Earth

3

an explosion of multi-cellular life

21

Multiple Choice

Question image

Dinosaurs lived in this era.

1

Mesozoic

2

Cenozoic

3

Paleozoic

22

23

Multiple Choice

Why are rocks moving all the time?

1

because they want to

2

because of the movement of the tectonic plates

3

because of supernatural phenomena

24

Open Ended

Why is it hard to find very, very old rocks?

The geological timescale

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