Earth's Layers - 7Th Grade Arlington Middle

Front 1

Name the four layers of the Earth's surface.

Back 1

Crust
Mantle
Outer Core
Inner Core

Front 2

What is the uppermost layer of the Earth's surface?

Back 2

The Crust

It is made up of rock that floated to the surface when the Earth was formed.

Front 3

True or False

The Earth's Crust is a continuos layer?

Back 3

False

The Earth's Crust is not a continous layer but it is made up of large masses called tectonic plates.

Front 4

The land part of the Earth's crust is called ____________.

Back 4

the Continental Crust

Front 5

What is the name of the layer of the Earth's surface that we walk around on?

Back 5

The Crust

Front 6

"Tectonic" means __________.

Back 6

Moving

Front 7

The Earth's Crust is made up of __________ _________.

Back 7

Tectonic plates

Front 8

The Continental Crust is between ____ to ____ miles thick, although it goes up to 45 miles in some places.

Back 8

10 to 15 miles

Front 9

The land part is divided into how many continents?

Back 9

Seven

Front 10

the water part of the Earth's Crust is at the bottom of the __________.

Back 10

Oceans

Front 11

The water part of the Earth's Crust is called the _________.

Back 11

Oceanic Crust

Front 12

The Oceanic Crust is between ____ and _____ miles thick.

Back 12

4 to 7 miles

Front 13

The crust is composed of

Back 13

granite
basalt
quartz
calcium
magnesium
carbon dioxide
clay and iron

Front 14

The second layer of the Earth's surface is called the ____________.

Back 14

the Mantle

Front 15

The Mantle is divided into two parts _____ and the _______.

Back 15

Outer Mantle (or upper)
and the Inner (or lower) mantel

Front 16

The Upper Mantel is made up of silicates of _____ and __________.

Back 16

iron & magnesium

Front 17

True or False

The Upper Mantel is firm on top with liquid rock on the bottom.

Back 17

TRUE

Front 18

Scientist refer to the top part of the Upper Mantle and the Crust together as the _________.

Back 18

Lithosphere

Front 19

True of False
The Lithosphere is the coldest, most brittle of the Earth's layers.

Back 19

TRUE

Front 20

True of False

The Inner Mantle is on top of the Upper Mantle.

Back 20

FALSE

Beneath the Upper Mantle lies the Inner (lower mantle). It is the layer closest to the Earth's Core.

Front 21

The Inner Mantle is composed of

Back 21

aluminium
melted rock
iron
magnesium
calcium

Front 22

The center of the Earth is called the

Back 22

Core

Front 23

The Core of the Earth is a dense metallic ball made mostly of _____ and some ________.

Back 23

iron with some nickel.

Front 24

True or False

The CORE is made up of two parts - the Inner Core and the Outer Core.

Back 24

TRUE

Front 25

The Outer Core is about ________ to ______ miles beneath the Earth's surface.

Back 25

1,800 to 3,200 miles

Front 26

The Outer Core is made up of

Back 26

iron
nickel
sulfur
oxygen

Front 27

True or False

The Outer Core is cooler than the Inner Core?

Back 27

True

Since it is cooler, the outer core remains a LIQUID.

Front 28

The Inner Core is about _____ miles thick.

Back 28

7800 miles

Front 29

It is about _______ to ________ miles beneath the Earth's surface.

Back 29

3,200 to 3,960 miles

Front 30

True or False

The Inner Core is very cold.

Back 30

FALSE

The Inner core is VERY HOT!
But the pressure is so great it remains a SOLID.

Front 31

True or False

The Inner Core radiates currents of heat upward toward the upper layers of the Earth's surface.

Back 31

TRUE

Front 32

Movement of tectonic plates cause

a. volcanic eruptions
b. earthquakes
c. mountain buildings
d. All of the ABOVE

Back 32

D. all the above

Front 33

Crust 10-25 miles / 1600 degrees
Mantle 1800 miles / 1600 to 4000 degrees
Outer Core 1430 miles / 4000 to 9000 degrees
Inner Core 780 miles radius / 9000 degrees

Back 33

Crust 10-25 miles / 1600 degrees
Mantle 1800 miles / 1600 to 4000 degrees
Outer Core 1430 miles / 4000 to 9000 degrees
Inner Core 780 miles radius / 9000 degrees