Earth Layer Composition of the Earth Three layers

Earth Layer

Composition of the Earth • Three layers: – crust – mantle – Core • #5 Temperature and density increases as depth increases. •

Crust • #6. The composition of the earth changes with depth and layers. • #7. The crust is the upper part of the rigid lithosphere and is of different composition under land as opposed to the ocean floor.

Mantle • 66% of mass of Earth • #11 Below the rigid lithosphere, the mantle consists of hot rock of tar-like consistency, which slowly moves or flows.

Lithosphere #10 The Lithosphere is the coolest layer of the earth. • #12 The lithosphere is the smallest layer of the Earth and it comprises 1% of the Earth’s total mass.

Core • Hottest layer of Earth • 33% of the Earth’s mass • Made of – Outer core – Inner core

Inner Core • Inner core is solid • Inner core is more dense • The most dense layer of the earth

Outer Core • The Outer Core is molten

Review • With respect to the layers of the earth, as the depth increases what happens to the temperature? • Temperature increases

Review The composition of the earth changes as ……. the depth of the layers.

Review • What are the two types of crust? • Oceanic & • Continental

Review • With respect to the layers of the earth, as the depth increases what happens to the density? • density increases

Review • What are three main layers of earth? • Core • Mantle • Crust

Review • Which is the coolest layer of the earth? • lithosphere

Review • The oceanic crust is make mainly of what? • basalt

Review • The continental crust is made up of mainly what? • granite

Review • Which is more dense? Oceanic or Continental crust? • Oceanic

Review • Which layer comprises 1% of the Earth’s total mass? • lithosphere

Review • Which layer comprises 66% of the Earth’s total mass? • mantle

Review • Which layer comprises 33% of the Earth’s total mass? • core