 List all four layers of the Earth.  Which layer of the Earth do we live on?

 There are four layers of the Earth  These four layers are: - the crust - the mantle - the outer core - the inner core

 R2VXA

 Crust- the thin outermost layer of the Earth that we live on top of.  Mantle- the largest layer of the Earth that is made up of rock and magma. The mantle is constantly circulating.  Outer Core- Made up of liquid Iron, and very dense.  Inner Core- Solid Iron, the densest part of the Earth. 1,000 hotter than the sun.  Lithosphere- includes the Earth’s crust and the top of the mantle, made up of solid rock. Includes the Earth’s plates.  Asthenosphere- includes the rest of the Mantle that is made up of magma which is solid and liquid rock. Where the mantle’s circulation takes place.

 The crust is the thin, outermost layer of the Earth  It is similar to the peel of an apple in the sense that it is thin and covers the outside of the Earth

- Hard, solid rock and liquid magma circulate around in the mantle. -This circulation moves tectonic plates and triggers Earthquakes and Volcanoes! -The mantle is the largest layer of the Earth

-Made up of liquid metal and liquid Iron -Extremely hot but not as hot as the inner core.

-1,000 times hotter than the sun. --Extremely dense and solid. --You have now made it to the center of the Earth!

 The cold, rigid, brittle lithosphere is made of crust and the uppermost part of the mantle. Plates are made of lithosphere.  The warm, plastic asthenosphere underlies the lithosphere.

DepthLayerSphereComposition 0-30 kmCrust LithosphereSolid Rock kmMantle LithosphereSolid Rock km Mantle AsthenosphereMolten Rock (Magma) km Mantle Solid Rock km Outer Core Molten (liquid) Iron/Metal km Inner Core Solid metal (Iron)

 1. Unwrap the cold taffy and try to bend it. What happens?  2. Unwrap the warm taffy and try to bend it. What happens?  3. Look at the picture of Earth's layers on p. 2.  4. Which better represents Earth's lithosphere, the cold or the warm taffy? _____________  Explain.   5. Which better represents the asthenosphere? ____________   Explain.

 Q: What is the difference between Earth’s outer and inner cores?  Q: Where have you seen evidence of the movement of Earth’s plates?

 Earth’s Changing Surface:  Unit Project Assignment

 A lot of the crust is hard to see because it is covered by soil, rock and water

 Anywhere you can see rock, you are seeing the crust of the Earth!!!  There are three types of rocks you need to know: - igneous rock - sedimentary rock - metamorphic rock CRUST!!!!

 “Igneous” means “born of fire”  Igneous rocks form when magma (lava) from volcanoes cools down  Granite is a type of igneous rock

 Sedimentary rock forms when sediment (basically, bits of different elements) is compacted into rock  Chalk and limestone are types of sedimentary rocks

 Metamorphic rocks form when other types of rock are squeezed together so much by the pressure within the Earth that they become new rocks  Marble is a type of metamorphic rock

 Crust can be different depending on where you are.  For example, crust is thicker beneath continents than it is beneath oceans or rivers  Mountains are parts of the crust that stick out (made of rock), and beneath and near mountains, the crust is thickest