Transcript Layers of the Earth Main Idea • Crust =Top Layer Supporting detail • Crust – layer of rock that form the Earth’s outer skin • the crust includes.

Layers
of the
Earth
Main Idea
• Crust =Top
Layer
Supporting detail
• Crust – layer of rock that form the
Earth’s outer skin
• the crust includes both dry land and
ocean floor.
• is solid
• Thin 5 to 25 miles thick
• 2 types of Crust
a. Continental Crust made
mostly of a rock called granite
(an intrusive igneous rock formed
by magma)
b. Ocean Crust (floor) made
mostly of a rock called basalt
(an extrusive igneous rock formed
by lava)
• Crust is home to all life on
Earth
thin
Continental
crust
Outer
layer
crust
CRUST
Home
to all
life
Ocean
crust
Changing earth
Chapt 1.1
Pages 10-13
solid
cool
rocky
1. In your note book make a Bubble map and describe the crust!
2. Write a definition of Crust in your note book under the Bubble map!
( use your own words.)
1. Draw a square box around the bubble map in the upper left hand
corner tell where you got your information for your bubble map
4. In the lower right hand corner write the chapter and page number
where you can find the information!
Main Idea
• Mantle =
Middle
layer
Supporting detail
• Mantle – an interior layer of
the Earth just below the crust
• is made up of hot rocks that
are solid.
• The mantle is divided into
layers based on physical
characteristics.
• Thickest layer approximately
2,900 km thick – about 1800
miles
Mantle
1. In your note book make a bubble map and define the mantle!
2. Write a definition of Mantle in your note book under the Bubble
map! ( use your own words.)
3. Draw a square box around the bubble map in the upper left hand
corner tell where you got your information for your Bubble map
4. In the lower right hand corner write the chapter and page number
where you can find the information!
Main idea
Outer Core =
Lower layer
Supporting detail
• Outer Core
– Liquid ( molten)
– layer of iron and nickel
– Temperature 4000-9000 F
– 1800 mile below surface of
Earth
– 1400 miles thick
– magnetic
Outer
core
Changing earth
Chapt 1.1
Pages 10-13
1. In your note book make a bubble map and define the outer core!
2. Write a definition of outer core in your note book under the bubble
map!
( use your own words.)
1. Draw a square box around the bubble map in the upper left hand
corner tell where you got your information for your bubble map
4. In the lower right hand corner write the chapter and page number
where you can find the information!
Main Idea
Inner Core =
innermost
layer
Supporting details
• Inner Core
• The inner core is center of
Earth
• Iron & nickel
• Solid
• Hottest layer (9000F)
• 800 miles thick/diameter
Inner
Core
1. In your note book make a Bubble map and describe the crust!
2. Write a definition of Inner Core in your note book under the
bubble map! ( use your own words.)
3. Draw a square box around the circle map in the upper left hand
corner tell where you got your information for your Bubble map
4. In the lower right hand corner write the chapter and page number
where you can find the information!
Main idea
How we know
about layers
Supporting details
• Seismic Waves =
earthquake waves
• Waves travel differently
through different
materials
Main Idea
Areas with in the
Crust
and Mantle
Supporting details
• Lithosphere – all of the
Earth’s crust and the very
top of the mantle
• Asthenosphere –
• The rest of the upper
mantle
• is not as solid it is a lot like
asphalt and can bend and
move
http://www.physicalgeography.net/fundamentals/10h.
html
Lithos = stone (Greek)
Lithosphere
Spheara = ball/globe (latin)
Asthenes = weak
(greek)
Asthneosphere
Spheara = ball/globe
(latin)
Review :
The layers of the Earth
Crust – solid, cool, outer layer of
the Earth
Mantle – solid, hot, layer below
the Earth’s crust
Outer Core – liquid hotter layer below
The Earth’s mantle
Inner core – solid, hottest, center
of the Earth
• Tectonic Plates
• Tectonic Plates aka
Lithospheric Plates or
Plates for short
• Made of lithosphere –all of
crust and upper part of
mantle
ocean
Crust
Tectonic /
Lithospheric
Plates
continental
Very top of mantle
http://www.brainpop.com/science/earthsystem/earthsstructure/