1. Ch 1A -Earth’s Layers

2. Earth’s Layers

3. Crust Thin rigid layer that surrounds the earth Two types of crust
Continental – granite
Oceanic – basalt
Oceanic Crust is more dense than continental crust but thinnest type of crust

4. Earth’s Layers Crust Thin rigid layer that surrounds the earth
Two types of crust
Continental – granite
Oceanic – basalt
Oceanic Crust is more dense than continental crust but thinnest crust
Earth’s Layers

5. Mantle
Mantle is less dense near the crust and more dense near the core
Solid and liquid mix
Mantle is the thickest layer
Outer edge is cool and rigid
Contains asthenosphere & part of lithosphere

6. Crust
Thin rigid layer that surrounds the earth
Two types of crust
Continental – granite
Oceanic – basalt
Oceanic Crust is more dense than continental crust
Earth’s Layers
Mantle
Mantle is less dense near the crust and more dense near the core
Mantle is the thickest layer
Outer edge is cool and rigid
Contains asthenosphere & part of lithosphere

7. Outer Core
Lower pressure allows the outer core to remain liquid & move around inner core causes Earth’s magnetic field
Made up of metals
Temperature and pressure are lower in the outer core than the inner core
Outer core is less dense than the inner core

8. Crust
Thin rigid layer that surrounds the earth
Two types of crust
Continental – granite
Oceanic – basalt
Oceanic Crust is more dense than continental crust
Earth’s Layers
Mantle
Mantle is less dense near the crust and more dense near the core
Mantle is the thickest layer
Outer edge is cool and rigid
Outer Core
*Lower pressure allows the outer core to remain liquid & move around the inner core causing Earth’s magnetic field
*Temperature and pressure are lower in the outer core than the inner core
*Outer core is less dense than the inner core

9. Inner Core
Intense pressure makes the inner core a solid even though it is very hot
Inner core is made up of metals (iron & nickle)
Inner core has the highest/greatest temperature, pressure and density

10. Crust
Thin rigid layer that surrounds the earth
Two types of crust
Continental – granite
Oceanic – basalt
Oceanic Crust is more dense than continental crust
Earth’s Layers
Mantle
Mantle is less dense near the crust and more dense near the core
Mantle is the thickest layer
Outer edge is cool and rigid
Outer Core
Lower pressure allows the outer core to remain liquid
Temperature and pressure are lower in the outer core than the inner core
Outer core is less dense than the inner core
Inner Core
Intense pressure makes the inner core a solid even though it is very hot
Inner core is made up o f metals (iron & nickle)
Inner core has the highest/greatest temperature, pressure and density

11. Lithosphere Crust & top rigid layer of mantle
Broken into tectonic plates (19)
“Litho” – stone
We “li”ve on the “li”thosphere 

12. Asthenosphere Hot, soft rock of mantle Flows, plasticity Magma
Convection currents which move tectonic plates

13. Moving from the CRUST to the CORE
Lowest Temperature
Lowest Pressure
Least Dense
All the above INCREASES as you go down
Highest Temperature
Highest Pressure
Greatest Density

14. Convection Currents CONTINUOUS MOVEMENT
Most Dense Sinks ( Cools) Less Dense Rises (heats)
Molecules are CLOSER Molecules are FARTHER
together apart
Heat Source