Layers of the Earth Notes Earths Layers Earth

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Layers of the Earth Notes

Layers of the Earth Notes

Earth’s Layers • Earth is divided into layers – 2 different ways • Composition

Earth’s Layers • Earth is divided into layers – 2 different ways • Composition – What it’s made of • Physical properties – What can be observed/doesn’t change chemical properties

Earth’s Layers by Composition • Crust • Core • Mantle Core

Earth’s Layers by Composition • Crust • Core • Mantle Core

Earth’s Layers by Composition • Crust – Outermost layer – Thinnest layer – Composed

Earth’s Layers by Composition • Crust – Outermost layer – Thinnest layer – Composed mostly of oxygen, silicon, and aluminum – Two types • Oceanic (found under oceans; more dense) – Twice as much iron, calcium, and magnesium which are more dense minerals • Continental (found under land; less dense)

Earth’s Layers by Composition • Mantle – Between the crust and core – Much

Earth’s Layers by Composition • Mantle – Between the crust and core – Much thicker than crust – Composed of more magnesium and less aluminum and silicon than the crust so it is more dense than the crust

Earth’s Layers by Composition • Core – Below the mantle; at the center of

Earth’s Layers by Composition • Core – Below the mantle; at the center of Earth – Makes up 1/3 of Earth’s mass – Composed primarily of iron and nickel • Almost no oxygen, silicon, aluminum, or magnesium – Heats the mantle by convection

Earth’s Layers by Physical Properties • • • Lithosphere Asthenosphere Mesosphere Outer Core Inner

Earth’s Layers by Physical Properties • • • Lithosphere Asthenosphere Mesosphere Outer Core Inner Core

Earth’s Layers by Physical Properties • Lithosphere – Solid, outermost part of Earth •

Earth’s Layers by Physical Properties • Lithosphere – Solid, outermost part of Earth • Includes crust and rigid upper part of mantle – Divided into pieces called tectonic (or lithospheric) plates

Earth’s Layers by Physical Properties • Asthenosphere – Found directly under the lithosphere –

Earth’s Layers by Physical Properties • Asthenosphere – Found directly under the lithosphere – Tectonic (lithospheric) plates move on this layer – Made of solid rock that flows slowly

Earth’s Layers by Physical Properties • Mesosphere – Found directly under the asthenosphere –

Earth’s Layers by Physical Properties • Mesosphere – Found directly under the asthenosphere – Lowest part of the mantle – Very strong

Earth’s Layers by Physical Properties • Outer Core – Found beneath the mesosphere –

Earth’s Layers by Physical Properties • Outer Core – Found beneath the mesosphere – Liquid layer of Earth’s core – Surrounds inner core – Made of iron and nickel – Heats the mantle by convection

Earth’s Layers by Physical Properties • Inner Core – Found beneath the outer core

Earth’s Layers by Physical Properties • Inner Core – Found beneath the outer core – Solid layer of Earth’s core • Very dense – Made of iron and nickel

Earth’s Magnetic Properties • Earth acts like a giant magnet • Earth (like any

Earth’s Magnetic Properties • Earth acts like a giant magnet • Earth (like any manufactured magnet) exhibits 2 poles – North – South • Earth’s outer core spins as Earth rotates – This creates the magnetic field

Compass • A compass is composed of a small, lightweight magnet (called a needle)

Compass • A compass is composed of a small, lightweight magnet (called a needle) – Balances on a point • One pole of the magnet will be attracted and point toward the Earth’s North Pole – This pole on the magnet is called the north pole of the magnet • Compasses are used for navigation from any point on Earth’s surface – Possible because of Earth’s magnetic field

Layers of Earth Comparisons PHYSICAL PROPERTIES Lithosphere Asthenosphere Mesosphere Outer Core Inner Core COMPOSITION

Layers of Earth Comparisons PHYSICAL PROPERTIES Lithosphere Asthenosphere Mesosphere Outer Core Inner Core COMPOSITION Crust Mantle Core

Layers of Earth Comparisons Lithosphere Asthenosphere PHYSICAL PROPERTIES COMPOSITION Crust Mantle Mesosphere Core Outer

Layers of Earth Comparisons Lithosphere Asthenosphere PHYSICAL PROPERTIES COMPOSITION Crust Mantle Mesosphere Core Outer Core Inner Core

Layers of Earth Comparisons

Layers of Earth Comparisons

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WHAT ARE EARTHS LAYERS MADE OF Earths LayersWHAT ARE EARTHS LAYERS MADE OF Earths Layers
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The Earths Layers The Earth has 4 LayersThe Earths Layers The Earth has 4 Layers
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Earths Layers Summarize the 3 layers of EarthEarths Layers Summarize the 3 layers of Earth
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