Transcript Layers of the Earth

Warm-up
• Take out your earth’s layers foldable.
• Your homework is now due tomorrow.
Keep your homework and DO NOT turn it
in.
• Take a notes page from the pink basket.
The notes are a half sheet.
• CROSS OUT THE WORD DENSITY.
WRITE TEMPERATURE INSTEAD. 
• Glue it on the next blank page in your INB.
Get ready to take some notes.
Layers of the Earth
How much do you know
about your planet?
True or False
The Earth is made up of 3 layers.
Answer: False 4 Layers
The Crust is the thickest layer.
Answer: False Mantle
The Inner Core is solid.
Answer: True
The Mantle has liquid rock.
Answer: True (so does the Outer Core)
Crust
• The crust is the outer most layer. Where we walk
and live.
• The crust is made up of the continents and the ocean
floor.
• The crust’s density and temperature increase with
it’s depth.
THICKNESS: The crust is up to 32 Kilometers (here to
Stone Mountain) thick.
TEMPERATURE: 0 degrees Fahrenheit to 1590 degrees
Fahrenheit
COMPOSITION: The continental crust consists of
rocks such as granite, sandstone, and marble. The
oceanic crust consists of basalt.
Lithosphere
• There are two kinds of crust: continental
and oceanic. Yes, there is even crust
under the ocean!
WHICH LAYERS: It has two parts, the
crust and the upper mantle.
PREFIX: The lithosphere (geosphere) is
the "solid" part of Earth
Mantle
• The mantle is the layer under the crust.
• The Mantle’s density and temperature
increase with it’s depth.
THICKNESS: It is up to 2,897 kilometers (from
here to Arizona) thick.
TEMPERTATURE: Top layer - hot solid rock
1590 degrees Fahrenheit; Bottom layer - hot
liquid rock 3992 degrees Fahrenheit
COMPOSITION: The mantle is made up of
rocks such as silicon, aluminum, iron, and
magnesium.
Asthenosphere
• The plates of the lithosphere
float on the asthenosphere
WHICH LAYERS: The plastic like
layer below the lithosphere is the
asthenosphere
PREFIX: Asthenes means weak
Outer Core
THICKNESS: The outer core is 2253
kilometers (here to New Mexico) thick.
TEMPERATURE: The temperature
ranges from 4000 – 9000 degrees
Fahrenheit
COMPOSITION: Made up of the hot
liquid metals iron and nickel.
Inner Core
• The very center of the earth
• The inner core is solid. It is under so much
pressure from the layers above that the metal
cannot spread out and become liquid.
THICKNESS: 1287 kilometers thick –
From here to Dallas, TX
TEMPERATURE: The inner core is
very hot, about 9000 degrees fahrenheit
COMPOSITION: Made of the metals
iron and nickel