Transcript Earth*s Layers

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How is a Twix bar
like the Earth?
Earth’s Layers
<1%
Earth’s mass
67%
Earth’s mass
33%
Earth’s mass
3 Compositional Layers
C.M.C.
Continental Crust
• 30-50 km thick
• Less dense
• Silicon, aluminum
Crust
Oceanic Crust
• 10 km thick
• More dense
• Iron, magnesium,
basalt
• A lot of
Magnesium
• A little silicon and
aluminum
• Denser than the
crust
• Holds magma that
comes out of
volcanoes
Mantle
•Iron and
nickel
•Most dense
•Extremely
hot
Core
Compositional vs. Physical
• Lithosphere
• Asthenosphere
• Mesosphere
• Outer Core
• Inner Core
• Laughing
• At
• My
• Omelet,
• Interesting!
5 Physical Layers
• Crust and Upper
Mantle
• Rigid
• Divided into
tectonic plates
Lithosphere (Laughing)
• Middle Mantle
• Soft, plastic-like
• Tectonic plates
floats on this
Asthenosphere (At)
• Lower Mantle
• Strong
• Semi-solid (Like caramel)
Mesosphere (My)
• Liquid because
the inner core
is so hot
• Reason why
Earth is a giant
magnet
Outer Core (Omelet)
• Center of Earth
• Solid ball
• Dense
• EXTREMELY
hot!
Inner Core (Interesting)
• Heavier elements tend to sink to
the core
• Lighter elements rise toward the
crust
Why are there layers?