Earth Layers.

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Presentation transcript:

Earth Layers

Density Density = mass/volume Heating an object causes it’s molecules to spread out causing it’s volume to change. Examples liquid, solid, gas phases Door key Marbles in bag

Viscosity A material’s Resistance to flow. How can viscosity be changed. 1. Adding Heat 2. Adding Water This will become extremely important when studying volcanoes.

Earth’s Layers What three things increase the closer to the center of the Earth (core) we go? Density (Composition, what matter it is made up of), temperature ( It gets Hotter!!!) and pressure. What are the three main layers of the Earth? - Core, Mantle and Crust

The Crust Made up of Silicates. (Very light material) Averages around 40 km in thickness. The Earth’s crust is like the shell of an egg, very thin!

The Mantle Composed of mostly silicates, but is also rich in iron and magnesium which makes it more dense than the crust. The Mantle has 3 parts Lithosphere (100km thick) Asthenosphere (100km thick) Mesosphere (2650km thick!)

The Core Extremely Hot center of the Earth! 5500 C Two parts Outer Core (liquid iron) 2,250km Inner Core (Solid iron due to high pressure) 1,300km

Earth Cross Section Drawing Drawing must include: -All layers -Crust, Mantle (lithospere, asthenosphere,and mesosphere.) Outer and Inner Core. -Each Layer must be clearly labeled with a title, the thickness of the layer and the composition of the layer. - Neatness will be taken into consideration when being graded! Drawing will be worth 25 points. Use notes!!!!!