The Layers of the Earth!

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The Layers of the Earth!
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Directions for todays activity

• Use the templates to cut the layers of the Earth
  out of construction paper
• Use
• Green for the crust
• Light brown for the mantle
• Yellow for the outer core
• Red for the inner core
• Lay them one on top of the other like in this
  diagram

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Next. . .

• Fold all of the circles down the middle (where
  the dotted line is in the figure). Then glue the
  bottom layers down to hold them in place.
• You have just made a slice of the Earth! Hold on
  to this until everyone is finished and well
  learn a little bit more about each part. Youll
  be taking notes on the upper half of the Earth.

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Earth Layers

• The Earth is divided into four main layers.
• Crust
• Mantle
• Outer core
• Inner core

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http//www.glossary.oilfield.slb.com/DisplayImage.
cfm?ID124
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The Crust

• The Earths crust is the outermost surface.
• It is a very thin layer of solid rock. It is
  the thinnest layer of the Earth.
• The crust is 5-35km thick beneath the land and
  1-8km thick beneath the oceans.
• The crust of the Earth is broken into many
  pieces called plates. The movement of these
  plates causes earthquakes.

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The Lithosphere

• On your mantle layer, draw a dotted line around
  the very edge of the circle. This is the
  lithosphere.
• The lithosphere is composed of part of the crust
  and the upper part of the mantle (the top 100
  km).
• It is composed of hard, brittle rock

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The Athenosphere

• The athenosphere is the part of the mantle
  underneath the lithosphere. Draw a dashed line
  about an inch under your dotted line.
• It is made of molten rock and metal so that it
  flows like hot asphalt.
• The athenosphere is the part of the mantle that
  moves and causes the tectonic plates of the crust
  to move as well.

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The Mantle

• The mantle is the largest layer of the Earth.
  It is 2900km thick.
• It includes the lithosphere and athenosphere.
• It is relatively flexibleit flows like very
  viscous liquid.
• It is very hot1600F at the top and 4000F
  towards the center of the Earth.

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The Core

• The core of the Earth is like a ball of very
  hot metals. The core is divided into 2
  layersOuter and Inner.
• The core is SO hot and has SO much pressure
  that if you were to go thereyou would be
  squished into something even smaller than a
  marble.

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The Outer Core

• The outer core is liquid metal iron and nickel
  with 10 sulfur and/or oxygen.
• It is very hot
• 4000-9000F.
• The outer core is 2,250km thick.

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The Inner Core

• The inner core is solid metal due to the
  extreme heat and pressure.
• It is composed of iron and nickel. It is
  responsible for the magnetic field the Earth
  generates.
• The inner core is 800km thick and is 9000F.

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Review

• 1) What are the four layers of the Earth?
• 2) The Earths crust is very ______?
• 3) The mantle is the largest layer of the Earth?
  True or False
• 4) Is the Outer Core a liquid or a solid?

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Answers!

• 1) Crust, Mantle, Outer Core, Inner Core
• 2) Thin
• 3) True
• 4) Liquid