LAYERS OF THE EARTH Flashcards
Earth is made up of 3 main layers
- crust
- mantle
- core
Composition =
what it’s made of
Physical properties =
characteristic that is unique and helps to identify the substance (temp, size, shape, color)
very thin
crust
2 Types of Crust
continental crust
oceanic crust
dry land, granite
less dense
Continental Crust:
ocean floor, Basalt, thinner than cont. crust
Oceanic Crust:
CRUST
–Physical Properties:
- Composition:
PHYSICAL PROPERTIES
•outermost layer
•thinnest layer
COMPOSITION
•consists of loose rocks
& soil
MANTLE
–Physical Properties:
–Composition:
Physical Properties:
•thickest layer (2900km thick)
•1600-4000 F
•66% of earth’s mass
•flowing
Composition:
•Molten rock
–Magma
CORE
–Physical properties:
–Composition:
–Physical properties:
•HOT! 4000-8000 F
•Very dense
•High pressure
•4000 miles from surface
•33% of Earth’s mass
•About the same size as
Mars
composition
•Iron and Nickel (metals)
As you get deeper inside the Earth, temperature____
Increases
As you get deeper inside the Earth, pressure ____
Increases
outermost layer – includes crust and uppermantle
•rigid
•divided into pieces or tectonic plates
•Rocks and soil
Lithosphere
Middle Mantle
•composed of ____
•layer on which pieces of lithosphere____(solid rock that flows)
–Think of it like ___
Asthenoshere
• solid flowing rock
• move on top
- caramel
Bottom Mantle
•strong, lower part of the mantle
•layer between asthenosphere and core
Mesosphere
Outer and Inner
• is divided into two parts
–Outer Core: Liquid iron and nickel that’s spinning
–Inner Core: Solid iron and nickel
•Solid because of all the pressure of the rest of the Earth surrounding it.
The Core
produced by earthquakes travel at different
speeds through solid rock and liquids
Seismic waves
Layers of the earth
Crust
Mantle
Outer core
Inner core
