Search Header Logo
Structure of the Earth

Structure of the Earth

Assessment

Presentation

Geography

9th Grade

Medium

Created by

Mariana Jimenez

Used 79+ times

FREE Resource

9 Slides • 14 Questions

1

Structure of the Earth

​Objective:

  • ​Determine the age of Earth

  • ​Identify the 4 Layers of the Earth

  • ​Explain the theory of Continental Drift

media

2

Open Ended

What do you think the Earth is made up of?

When we go outside, we see grass and dirt, but do you think there is more to the Earth?

3

Multiple Choice

How old do you think the Earth is?

1

a few thousand of years old

2

billions of years old

3

hundreds of thousand of years old

4

millions of years old

5

tens of thousands of years old

4

As you watch the video think about:

​How do scientist determine the age of the earth?

​Where were some of the oldest rocks found on Earth?

5

Multiple Select

How did scientists determine the age of the Earth? (Choose all correct answers) 

1

by guessing

2

by making estimations based on evidence

3

by analyzing rocks from outer space

4

by analyzing rocks from different parts of the Earth

6

Multiple Select

Where were some of the oldest rocks found on Earth?

1

in Australia

2

in Canada

3

in Einstein's back garden

7

​Layers of the Earth

Crust- is the outermost solid shell of the earth, accounting for less than 1% of Earth's volume

Mantle-  is the mostly-solid bulk of Earth's interior. (MAGMA)

Outer core-third layer of the earth, is responsible for Earth's magnetic field.

Inner core- is the innermost geologic layer of the planet Earth.

media

8

​CRUST

  • the shell of a hard-boiled egg

  • thin, cold and brittle

  • made of light elements (silica, aluminum and oxygen)

  • broken into big pieces, like a gigantic jigsaw puzzle (TECTONIC PLATES)

media

9

MANTLE, earth's thickest layer

  • 1,865 miles thick

  • Made mostly of iron, magnesium and silicon,

  • it is dense, hot and semi-solid (think caramel candy)

  • 1,100 and 2,400 degrees Fahrenheit

  • Diamonds are tiny pieces of the mantle we can actually touch.

media
media

10

OUTER CORE

  • made from iron and nickel, just in liquid form

  • 3,220 to 1,790 miles below the surface

  • ​VERY HOT-8,132° and 9,932° Fahrenheit

media
media
media

11

INNER CORE

  • 4,000 to 3,220 miles beneath Earth’s surface.

  • Extremely dense, it’s made mostly of iron and nickel

  • INTENSELY HOT - 9,800° Fahrenheit

  • almost as hot as the surface of the sun

media
media
media

12

Multiple Choice

Which is the coolest part of the planet?

1

inner core

2

outer core

3

mantle

4

crust

13

Multiple Choice

Which of these layers is the largest?

1

lithosphere

2

asthenosphere

3

outer core

4

mantle

14

Multiple Choice

Which is the hottest part of the Earth?

1

The core

2

The mantle

3

The crust

4

The Asthenosphere

15

Multiple Choice

Which two metals are thought to be found in the core?

1

iron and steel

2

iron and nickel

3

gold and silver

4

iron and copper

16

Open Ended

Question image

What is continental drift? Have you heard this term before? Have you heard the term PANGEA? 

17

​Watch the following Video about Continental Drift

Think about:

​What is the theory of continental drift?

​What evidence did Wegener use?

18

​Pangea

a supercontinent that assembled from earlier continental units approximately 335 million years ago, and began to break apart about 175 million years 

​Continental Drift Theory:

​the hypothesis that the Earth's continents have moved over geologic time relative to each other (3cm per year)

media

19

Multiple Choice

What does the theory of continental drift state?

1

The continents were once joined in a super-continent and have moved over time

2

Continents are stationary and do not move

3

The Earth is broken into lithospheric plates that move due to convection currents

4

none of the above

20

Multiple Choice

What evidence did Wegener use in his theory?

1

Continents and fossils fitting together/matching-up like puzzle pieces 

2

glacier scars and evidence from temperature

3

mountain ranges and coal deposits line up across continents

4

all of the above

21

Multiple Choice

Question image

Who is the person credited with developing the theory of continental drift?

1

Harry Hess

2

Galileo

3

Alfred Wegener

4

Newton

22

Multiple Choice

Question image

What is this a picture of?

1

plate tectonics

2

continental drift

3

pangea

4

glacier scaring

23

Open Ended

In your own words, what is the continental drift theory?

Structure of the Earth

​Objective:

  • ​Determine the age of Earth

  • ​Identify the 4 Layers of the Earth

  • ​Explain the theory of Continental Drift

media

Show answer

Auto Play

Slide 1 / 23

SLIDE