Structures of the Earth

4 Layers of the Earth

Essential Standards

• 6.E.2 Understand the structure of the earth and how interactions of constructive and destructive forces have resulted in changes in the surface of the Earth over time and the effects of the lithosphere on humans.

Clarifying Objectives

• 6.E.2.1 Summarize the structure of the earth, including the layers, the mantle and core based on the relative position, composition and density.

Essential Questions

• What are the Layers of the Earth?

• What is the order of DENSITY of the Earth’s Layers?

• What materials & elements make up each layer of the Earth?

• What position from inner to outer are the Earth’s Layers found?

EOG Questions

• What is the COMPOSITION of the Earth’s core?

• What is the order of DENSITY of the Earth’s Layers?

Where it all Starts• The Earth- the earth is made

mostly of rock

• 75% or ¾ of the earth is covered in liquid water

• There are 4 layers to the earth…

① Inner Core② Outer Core③ Mantle④ Crust

• http://www.youtube.com/watch?v=bgnn096PfWQ

Layers of the Earth

• Layers of the Earth- Physical Structure of the Earth from inside to outside

• Layers of the Earth tell scientists ① Position ② Composition③ Density

Earth’s Density• Remember that DENSITY is how

closely pact TOGETHER ATOMS are

• The 4 Layers of Earth has a very distinct Density

• The layers get more & more dense the closer you get to the CENTER of the Earth

• Crust is the LEAST DENSE

• Inner Core is the MOST DENSE

Essential Questions

• Get with a partner and answer…

• What are the Layers of the Earth?

• What is the order of DENSITY of the Earth’s Layers?

Earth’s Core

• The Earth’s Core make up the first 2 Layers of Earth

• They make up the ① Inner Core② Outer Core

• http://www.youtube.com/watch?v=DW4xWyiQdSM

Inner Core

• The Inner Core is the DENSEST of the 4 Layers of Earth

• It is COMPOSED (made) of SOLID IRON

• Inner Core is located at the very CENTER of the Earth

Outer Core

• The Outer Core is still very dense it ranks 2nd in DENSITY

• Outer Core is composed of LIQUID IRON

• Located as the SECOND layer of the Earth

Essential Questions

• Get with a partner and answer…

• What materials & elements make up each layer of the Earth?

Mantle

• Mantle ranks 3rd in DENSITY behind the Inner & Outer Core

• Mantle is composed of a combination of ROCKS & GASSES that make LIQUID MAGMA

• The Mantle makes up the 3rd layer of the Earth

Essential Questions

Get with a partner and answer…

• What materials & elements make up each layer of the Earth?

Crust• The Earth’s Crust ranks last (4th)

in DENSITY as it is the LEAST dense layer of the Earth

• The Crust is composted of the Crustal Plates & Ocean Basin Plates

• It also contains the Athenosphere & Lithosphere

• It makes up the 4th Layer of the Earth

Essential Questions

Get with a partner and answer…

• What materials & elements make up each layer of the Earth?

Essential Questions

Get with a partner and answer…

• What position from inner to outer are the Earth’s Layers found?

EOG Questions

• Which best describes the Earth’s Crust?

• A) It is stationary and unable to move.

• B) It is thicker than the mantle and the core.

• C) It is located between the outer and the inner core.

• D) It is composed of continental and oceanic plates.

EOG Questions

• Which best summarizes the COMPOSITION of the Earth’s Core?

• A) It contains a solid outer region surrounding a liquid iron core.

• B) It contains a liquid outer region surrounding a solid iron core.

• C) It contains a semi-liquid rock outer region surrounding a liquid core.

• D) It contains a basalt, semi-liquid outer region surrounding a solid core.

Important Points• The Earth has 4 Layers that tell

scientists ① Position② Composition③ Density

• Inner Core① Center of the Earth② SOLID IRON③ MOST DENSE

• Outer Core① 2nd from the Center② LIQUID IRON③ 2nd most DENSE

• Mantle① 3rd from the Center② LIQUID Magma③ 3rd most DENSE

• Crust ① LAST layer of Earth② Crustal Plates & Oceanic Basin

Plates③ LEAST DENSE

• Crust also includes– Athensophere– Lithosphere