Unit 4 Lesson 5 Earths Layers Copyright Houghton

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Unit 4 Lesson 5 Earth’s Layers Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers New Jersey Standards • MS-ESS 2 -3: Analyze

Unit 4 Lesson 5 Earth’s Layers New Jersey Standards • MS-ESS 2 -3: Analyze and interpret data on the distribution of fossils and rocks, continental shapes, and seafloor structures to provide evidence of the past plate motions. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers Peeling the Layers What is inside Earth? •

Unit 4 Lesson 5 Earth’s Layers Peeling the Layers What is inside Earth? • Earth is made of several layers. • Each layer has its own characteristic properties. • Scientists think about Earth’s layers in two ways— in terms of chemical composition, and in terms of physical properties. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • Earth can

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • Earth can be divided into three layers based on chemical composition: the crust, the mantle, and the core. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • The outermost

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • The outermost solid layer of Earth is the crust. • There are two types of crust: continental and oceanic. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • Both types

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • Both types of crust are made mostly of oxygen, silicon, and aluminum. • Oceanic crust is denser than continental crust because it contains almost twice as much iron, calcium, and magnesium. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • The mantle

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • The mantle is located between the crust and the core. • The mantle is a region of hot, slow-flowing solid rock. • The mantle contains more magnesium and less aluminium and silicon than the crust. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • Convection is

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • Convection is the movement of heated material as a result of differences in density. • Convection in the mantle causes cooler rock to sink and warmer rock to rise. Copyright © Houghton Mifflin Harcourt Publishing Company

REVIEW!! • What are the 3 compositional layers of the earth? • Crust, Mantle,

REVIEW!! • What are the 3 compositional layers of the earth? • Crust, Mantle, Core • Name the 2 types of crust • Continental, oceanic • What occurs in the mantle that moves lithospheric plates? • Convection • What is the core made of? • Iron and nickel

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • The core

Unit 4 Lesson 5 Earth’s Layers What are Earth’s compositional layers? • The core extends from below the mantle to the center of Earth. • Scientists think the core is made mostly of iron and some nickel. • The core is the densest layer and makes up about one-third of Earth’s mass. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • Earth is

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • Earth is also divided into layers based on physical properties, such as whether the layer is solid or liquid. • The five physical layers are the lithosphere, asthenosphere, mesosphere, outer core, and inner core. • Meso = middle • Sphere = ball Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The outermost,

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The outermost, rigid layer of Earth is the lithosphere. • The lithosphere is made of the crust and the upper part of the mantle. • The lithosphere is divided into tectonic plates. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The asthenosphere

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The asthenosphere is the layer of the mantle made of solid rock that moves very slowly. • The asthenosphere is located below the lithosphere. • Tectonic plates move on top of the asthenosphere. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The strong,

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The strong, lower part of the mantle is called the mesosphere. • Rock in the mesosphere flows more slowly than rock in the Asthenosphere. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The outer

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The outer core is the liquid layer of Earth’s core. • The outer core lies beneath the mantle and surrounds the inner core. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The inner

Unit 4 Lesson 5 Earth’s Layers What are Earth’s physical layers? • The inner core is the solid, dense, center of our planet. • The inner core extends from the bottom of the outer core to the center of Earth. Copyright © Houghton Mifflin Harcourt Publishing Company

Study Guide • Know the 4 (core divided) compositional layers of the Earth •

Study Guide • Know the 4 (core divided) compositional layers of the Earth • Know the 5 physical layers of the Earth • Know where the layers are located • Know properties of each layer • Know what each layer is composed of • Know ALL vocabulary terms

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