Download Chapter 6 Plate Tectonics

Chapter 6
Plate Tectonics
Tectonic Plates
Earth’s
crust is broken into about 19 pieces
These plates move on top of the
asthenosphere.
The thicker continental crust rises above ocean.
The rest of the plate is thin oceanic crust, or sea
floor
6.1 Layers of the Earth
Earth is made up of materials with
different densities

CRUST

MANTLE

CORE
Different properties of the Earth’s
layers
To explore the interior, scientists study the
energy from earthquakes or underground
explosions they set off.
1. Core, Mantle, Crust
2. Lithosphere and Asthenosphere
The Core
The Earth’s densest part.
 It is made up of two parts:

1- The inner core : a ball of hot,
solid metals.
2- The outer core: a liquid metals
layer surrounding the inner core.
The Inner Core
It
is solid with high
temperature and
pressure.
Metals are squeezed
together and are not
able to move.
The Outer Core
It
is a very dense liquid
made up of iron.
It
is just like a ball of very
hot metals.
The Mantle
 It
is the thickest layer of the earth located
below the crust.
 It
has layers of cool, rigid rock
at the top and a layer of hotter
softer rock below it.
The Crust
 An
outer and thin layer of cool rock.
 It has two main types:
- Oceanic (all the ocean floors)
- Continental (all continents, and major islands)
Oceanic and Continental Crust
The crust is home for all life on earth.
Earth’s Layers
How do you think the earth and the egg
are related to each other?
Earth’s Layer
Shell = crust
Egg white = mantle
Yolk = core
Lithoshphere
•
In the Mantle
litho means “stone” or
“rock”.
Asthenoshpere
• asthenes means
“weak”.
• Earth’s crust and the very
top of the mantle.
• A layer of hotter softer
rock in the upper mantle.
• Is the most rigid of all
layers.
• Solid rock that flows
slowly(hot asphalt).
https://www.youtube.com/watch?v=eXiVGEEPQ6c
https://www.youtube.com/watch?v=NAHY6965o08