Transcript LAB 2

LAB 2:
The Interior of the Earth
Key Question: What does the
interior of the Earth look like?
Part D:
Refraction of Earthquake Waves
Earthquake 



Can travel through
SOLID, LIQUID &
GAS
Can travel through
the whole planet
The P-waves change
direction
(REFRACT) at the
boundary between
the different layers
of the Earth



Can only travel
through SOLIDS
Cannot travel
through the outer
core
S-waves can travel
through the mantle
because it is a semisolid
SHADOW ZONES:
 Area
on the Earth’s surface where
seismic waves are not detected
 Caused
by wave refraction
 Shows us that the Earth is LAYERED
 The core must be made of a
different material than the mantle
to make the waves refract
LAB 2:
VOCABULARY
PART D
44. Shadow Zones
Area on the earth’s surface
where no seismic waves are
detected due to refraction
INSIDE
THE
EARTH
The LAYERS:
CRUST
MANTLE
OUTER CORE
INNER CORE
CRUST
 Outermost
Layer
 Earth’s Surface
 Cool & Rocky
 Very Thin
 The rigid, rocky outer surface
of the Earth, composed mostly
of basalt and granite. The crust
is thinner under the oceans.
MANTLE
 Dense,
Hot Layer
 Semi-Solid Rock
 The rocky layer located
under the crust
OUTER CORE
 Liquid
Layer (Molten)
 Liquid Iron & Nickel
 No S-Waves
 The molten iron-nickel layer
that surrounds the inner
core.
INNER CORE
 Solid
Layer
 Solid Iron & Nickel
 The solid iron-nickel center
of the Earth that is very hot
and under great pressure.
LAB 2:
VOCABULARY
PART D
3. Asthenosphere
Part of the mantle (just below the
lithosphere) that has plasticity (the
ability to flow)
31. Lithosphere
Rigid, outer part of the earth made up
of the crust and upper part of the
mantle
21. Crust
Rocky, outermost layer of the
earth
24. Inner Core
Innermost layer of the earth made
of solid iron and nickel
51. Outer Core
Layer of the earth made of liquid
iron and nickel