Layers of the Earth Notes PPT WBSLST NET SET

Layers of the Earth Notes PPT WBSLST NET SET

• 1.
  Layers of theEarth
• 2.
  Think of thelayers of the Earth like the layers of a cake.
• 3.
  Use the Layersof the Earth Foldable to take notes
• 4.
  Crust Ocean Land
• 5.
  • Thinnest layerof the Earth that ranges from only 2 miles in some areas of the ocean floor to 75 miles deep under mountains silicon aluminum • Made up of large amounts of and • Two types of crust: oceanic crust and continental crust • Composed of plates on which the continents and oceans rest Ocean Land Crust
• 6.
  Mantle Upper Mantle Middle Mantle Convection Currents Lithosphere Lower Mantle Mesosphere
• 7.
  • Solid butcapable of flow (like hot asphalt or fudge) • Thickest layer of the Earth (making up 70% of the Earth’s mass) • The hot material (magma) in the mantle rises to the top of the mantle, cools, then sinks, reheats, and rises again. These convection currents cause changes in the Earth’s surface Upper Mantle Convection Currents Middle Mantle Lower Mantle Mantle
• 8.
  Lithosphere Crust and upperMantle • outermost layer – includes crust and upper mantle • rigid • divided into pieces or tectonic plates • Rocks and soil
• 9.
  Asthenosphere Middle Mantle • composedof solid flowing rock • layer on which pieces of lithosphere move on top (solid rock that flows) – Think of it like caramel
• 10.
  Mesosphere Lower Mantle • strong,lower part of the mantle • layer between asthenosphere and core
• 11.
  Core Inner Core Outer Core
• 12.
  Outer Core • Molten (liquid)metal that is about 4,700°C (8,500°F) 1,800 miles • Located about beneath the crust and is about 1,400 miles thick • Composed of the melted metals nickel and iron
• 13.
  Inner Core • Solid spherecomposed mostly of iron • It is believed to be as hot as 6,650°C (12,000°F) • Heat in the core is probably generated by the radioactive decay of uranium and other elements • It is solid because of the pressure from the outer core, mantle, and crust compressing it tremendously
• 14.
  The Earth islike a peach or a boiled egg. Turn to a seat partner and discuss these analogies. Come up with another analogy and be prepared to share.
• 15.
  What do thesetwo images tell us about the layers of the Earth?
• 16.
  Temperature increases as depthincreases
• 17.
  Add this statementto the arrow going down on your foldable. Temperature, Density and Pressure increases as depth increases
• 18.
  Which layer ofthe Earth has the greatest temperature, pressure, and density? Core
• 19.
  THANK YOU