Download Inside Earth: Earth*s Interior - 7-8WMS

Inside Earth: Earth’s
Interior
Content Objectives:
SWBAT explain how geologists
determined Earth’s inner
structures.
SWBAT explain the
characteristics of Earth’s crust,
mantle, and core.
Language Objectives:
SW will discuss the evidence
geologists use to determine
Earth’s inner structures.
SW draw and label a diagram of
Earth’s crust, mantle, and core.
How do scientists
know what the
inside of the Earth
looks like?
Key Concept: Geologists have used two
main types of evidence to learn about
Earth’s interior: direct evidence from rock
samples and indirect evidence from
seismic waves.
• Seismic waves: waves made by
earthquakes.
Layers of the Earth Rap
Watch the video and write
down the layers of the Earth
and 5 additional facts.
http://www.youtube.com/watch?v=Q9j1xGaxYz
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Layers of the Earth Rap
What are the layers of the
Earth?
What are they made of and
how thick are they?
How do they behave?
http://www.youtube.com/watch?v=hHteUIS0OF
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Exit Card
8 January 2014
•3 main layers of the Earth
•2 types of crust
•1 method geologists used
to determine the
composition of the interior
of Earth.
A Journey to the Center of
Earth
• Key Concept: Three main layers of
Earth are the crust, the mantle, and
the core. These layers vary greatly
in size, composition, temperature,
and pressure.
A Journey to the Center of
Earth
• Temperature increases as you go
to the center of the Earth.
• Pressure increases as you go
to the center of the Earth.
• Pressure: a force pressing on an
area
The Core
• Key Concept: The core is made
mostly of the metals iron and
nickel. It consists of two parts – a
liquid outer core and a solid inner
core.
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•
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The Core
Core has two layers – outer core
and inner core.
Outer core– made of liquid metal.
It flows in currents. These currents
make Earth act like a magnet.
Inner core – made of solid metals.
The Core
•Outer core: a layer of molten
metal that surrounds the inner
core.
•Inner core: a dense ball of solid
metal
The Mantle
• Key Concept: Earth’s mantle is
made up of rock that is very hot,
but solid. Scientists divide the
mantle into layers based on the
physical characteristics of those
layers. Overall, the mantle is
nearly 3000 km thick.
MANTLE
• Def.: Layer of the Earth between
the crust and core
• Sent.: Lithosphere is made up of
the crust and the top layer of the
mantle.
• Sp.: manto
• Explain to your neighbor where the
mantle of the Earth is located.
The Mantle
• Mantle is the thickest layer, just below the
crust. Has 3 layers.
• Lithosphere – the crust and the top layer
of the mantle. Make of solid rock.
Averages 100 km thick.
• Asthenosphere – the middle layer of the
mantle. Made of pliable rock.
• Mesosphere: Lower mantle – solid rock.
The Mantle
•Mantle: is the layer below the
crust
•Lithosphere: top layer of the
mantle and the crust
•Asthenosphere: middle
layer of the mantle
The Crust
•Key Concept: The crust is a
layer of solid rock that includes
both dry land and the ocean
floor.
The Crust
• Thinnest layer – 5 to 70 km thick
• Oceanic crust – makes up
ocean floors and made mostly
of basalt
• Continental crust – makes up
the continents and made mostly
of granite, thicker than oceanic
The Crust
• Crust: a layer of rock that forms
Earth’s outer skin.
• Basalt: a dark rock with a fine
texture
• Granite: a light color rock with a
coarse texture