3Layers of the EarthIf we could take a chunk out of the Earth, we would see that it is made up of different layers.
4Layers of the Earth Earth is made up of 3 main layers Crust Mantle CoreEach layer has it’s own individual composition and physical properties.
5Physical Properties and Composition Composition= what it’s made ofPhysical properties= characteristic that is unique and helps to identify the substance (temp, size, shape, color)Example: Chocolate Chip CookiesComposition- flour, eggs, sugar, chocolatechips, baking powder, butterProperties- round, rough, sweet, tan and black, hot, lumpy,
6Layers of the Earth(p90) CRUST Physical Properties: outermost layerthinnest layer (5-70km thick)Surface temperature1% of Earth’s masswhere we livetouches the atmosphereComposition:consists of loose rocks& soil
82 Types of Crust Continental Crust: dry land, granite less dense Oceanic Crust:ocean floor,Basalt, thinnerthan cont. crustbut more dense
9Layers of the Earth MANTLE Physical Properties: thickest layer (2900km thick)F66% of earth’s massflowingComposition:Molten rockMagma
10Layers of the Earth CORE Physical properties: HOT! 4000-8000 F Very denseHigh pressure4000 miles from surface33% of Earth’s massAbout the same size asMarsComposition:Iron and Nickel (metals)
11What have you noticed about temperature and pressure? As you get deeper inside the Earth, temperature IncreasesAs you get deeper inside the Earth, pressure Increases
12Layers of the Earth The 3 main layers of the Earth can be divided further bythe way they “act”within the Earthand by theirdifferent physicalproperties.
13Lithosphere Crust and upper Mantle outermost layer – includes crust and upper mantlerigiddivided intopieces ortectonic platesRocks and soil
14Asthenosphere Middle Mantle composed of solid flowing rocklayer on which pieces of lithosphere move on top (solid rock that flows)Think ofit like caramel
15Mesosphere Bottom Mantle strong, lower part of the mantlelayer between asthenosphere and core
16The Core Outer and Inner The core is divided into two partsOuter Core:Liquid iron and nickel that’s spinningInner Core:Solid iron and nickelSolid because of all the pressure of the rest of the Earth surrounding it.