Geosytems- Layers of the earth (unit 4)

Outer layer, very thin and brittle, solid, made of brittle rock ->oxygen and silicon abundant

• Crust

• Inner core

• mantle

• outer core

How many layers of earth are there?

2nd layer, mostly solid, made of rock ->iron and magnesium, uppermost mantle cooler and more rigid like the crust.

• Mantle

• Outer core

• inner core

• crust

3rd layer, liquid (dominated by iron and nickel). responsible for earths magnetic field

• outer core

• inner core

• mantle

• crust

innermost layer, solid (dominated by iron and some nickel)

• inner core

• mantle

• outer core

• crust

Mantle convection has litosphere and asthenosphere

• rock controlled by pressure and temp

• litosphere

• Mobile zone of mantle (plasticity or flo

• asthenosphere

• “Floats” on top of asthenosphere

• asthenosphere- melting point of

• Composed of hot, semi-solid material

• Litosphere

• Rigid upper mantle and overlying crust

• asthenosphere

this layer is THE ONLY LIQUID LAYER

Earths magnetic field protects our atmosphere from

• solar winds and particles

• ocean floor striping

• north and south poles

• liquid metal layers

drag the labels correctly explains each picture

a

b

travels only through liquids

travels through solids, and liquids

travels only through solids

Reorder the less dense to most dense

• crust

• inner core

• outer core

• mantle

• most dense