layers of the earth 6th

Layers of the Earth

Interactive Lesson

4 Basic Layers

-Crust

-Mantle

-Outer Core

-Inner Core

The farther you go to the center of the earth, the greater the temperature becomes.

• It is earth's outer, most coolest, and least dense layer.

• There is two types of crust: Continental Crust and Oceanic Crust

• Oceanic crust: lies beneath the ocean, and is 5 to 10 kilometers (3 to 6 miles) thick.

• Continental crust: contains mostly land, and is 15 to 70 kilometers (9 to 45 miles) thick, the thickest being under a mountain.

• There are areas known as Mid-ocean Ridges where oceanic crust is constantly being created.

CRUST​

Multiple Choice

What are the two types of crust?

• Asthenosphere and Mesosphere

• Lithosphere and Asthenosphere

• Oceanic and Continental

Multiple Choice

Earth's outermost compositional layer?

• Crust

• Mantle

• Core

Asthenosphere

• Upper part of the mantle that is made of semisolid rock.

• Flows slowly.

• Convection currents occur her causing tectonic plates to move.

The mantle is about 2,900 kilometers (1800 miles) thick, and the lithosphere and asthenosphere is in the mantle.

​Mantle

Multiple Choice

True or False. The Earth's crust is thicker than the inner layers.

• True

• False

Multiple Choice

What causes the asthenosphere to move?

• Convection currents

• Outer Core

• Inner Core

The Core

The Outer Core: The liquid layer of the Earth’s core that lies beneath the mantle and surrounds the inner core.

The Inner Core: The solid, dense center of our planet that extends from the bottom of the outer core to the center of the Earth. (3,964 miles beneath the surface)

Outer Core

• Solid, dense center of Earth made of iron and nickel.

• Although the inner core is very hot, it is kept solid due to the great pressure of the layers above it.

• About 6,380 km below Earth's surface.

​

​INNER CORE

Multiple Choice

Which mechanical layer is kept solid by extreme pressure even though it is very hot?

• Lithosphere

• Mesosphere

• Outer Core

• Inner Core

Multiple Choice

Which mechanical layer is made up of the crust and upper part of the mantle?

• Lithosphere

• Asthenosphere

• Mesosphere

Multiple Choice

Mechanical layer of the mantle that is made of semisolid rock that flows slowly?

• Lithosphere

• Astehnosphere

• Mesosphere

Multiple Choice

Mechanical layer that is divided into pieces called tectonic plates?

• Lithosphere

• Asthenosphere

• Mesosphere

Multiple Choice

What layer of the mantle is flexible like plastic?

• lithosphere

• asthenosphere

• lower mantle

Multiple Choice

What is denser? The lithosphere or the asthenosphere?

• Lithosphere

• Asthenosphere