Download Earth`s Layers

Earth’s Layers
Pages C6-11
Earth’s Layers
 Crust-where we walk
 Mantle-thickest layer,
made mostly of solid
rock
 Core (Outer and
Inner) – deep inside
the earth, made of iron
and nickel
How deep are the layers?
Crust: 3-43 miles deep
 Mantle: about 1,790 miles
deep
 Outer Core: about 1,410
miles deep
 Inner Core: about 750 miles
deep

Which layer is the hottest?

Inner Core-may be as hot as the sun
What are Plates?


Continent-sized slabs that make up
the crust and the mantle
Plates are constantly moving, very
slowly
Plates Move:
Away from each other
 Toward each other
 Past each other

When Plates Move Together

Mountains or Volcanoes
are formed
When Plates Move Past
Each Other

Earthquakes occur
Railroad tracks after an
earthquake.
For Discussion
What are the three
layers of the earth?
 Crust, Mantle, Core
 On which layer do we
live?
 Crust

Which is the thickest
layer?
 Mantle
 Which layer is the
hottest?
 Inner Core

How often do earth’s
plates move?
 They are in constant
motion.
 At what speed do they
move?
 Slowly (only a few
centimeters per year)

What is formed when
plates move together?
 Mountains and
Volcanoes
 What happens when
plates slide past each
other?
 Earthquakes occur.
