Download Earth`s interior

Introducing Earth
Chapter Ten: Inside Earth
• 10.1 Sensing the Interior of the Earth
• 10.2 Earth’s Interior
• 10.3 Earth’s Surface
10.2 The Earth’s Interior
• Oceanic crust lies
under the oceans and
is thin at an average
depth of 5 kilometers.
• Continental crust is
thicker at an average
depth of 30
kilometers.
What is below the crust?
10.2 The crust and the mantle
• In a simplified
view of Earth, the
mantle includes
everything below
the crust and
above the core.
10.2 The crust and the mantle
• The lithosphere
includes the crust
and a thin part of the
upper mantle.
What lies above
the lithosphere?
10.2 The crust and mantle
• The asthenosphere lies
just under the
lithosphere and is the
outermost part of the
lower mantle.
• The asthenosphere is
a slushy zone of hot
rock with a small
amount of melted rock.
It’s like the “jelly” in a
jelly sandwich.
10.2 The Earth’s Interior
– The outer core is
made mostly of iron,
and is so hot the
iron is melted.
– The inner core is
also made mostly of
iron, but it is solid
because of the
Why is the inner core solid?
intense pressure.
10.2 The crust and mantle
• Earth’s magnetic
field is created by the
motion of liquid iron in
Earth’s outer core.
• Earth’s magnetic field
protects the planet
from harmful radiation
from the Sun.
10.2 Layers of Earth
• Compare and contrast the details of
the different layers of the Earth.