Transcript Seismic Waves and Earth`s Interior

Seismic Waves and Earth’s Interior
Eric Angat
Environmental Science
How can you survive from
pancaking?
Underwater
earthquakes can
cause tsunami!
Liquefaction can
cause buildings to
collapse.
Epicenter. Earthquake
Transform
Boundary
felt on the surface
Seismic waves
Fault line
FOCUS- Origin of the
earthquake, happens
underground.
http://sciencewithme.com/learn-about-earthquakes/
Seismic Waves
are produced by Earthquakes
Body Waves
Surface Waves
Slowest
P-Wave
S-Wave
Fastest
Fast
Can travel
through
Earth
Can travel
through Earth,
but not
through the
core.
Travels only on Earth’s
surface
1. What are the two
types of seismic
waves?
2. What are the two
types of body waves?
Seismic Waves
are produced by Earthquakes
Body Waves
Surface Waves
Slowest
P-Wave
S-Wave
Fastest
Fast
Can travel
through
Earth
Can travel
through Earth,
but not
through the
core.
Travels only on Earth’s
surface
3. What produces
seismic waves?
4. Which seismic wave
can travel through
earth?
Seismic Waves
are produced by Earthquakes
Body Waves
Surface Waves
Slowest
P-Wave
S-Wave
Fastest
Fast
Can travel
through
Earth
Can travel
through Earth,
but not
through the
core.
Travels only on Earth’s
surface
5. Which seismic wave
can travel only up to
the mantle, not the
core?
Seismic Waves
are produced by Earthquakes
Body Waves
Surface Waves
Slowest
P-Wave
S-Wave
Fastest
Fast
Can travel
through
Earth
Can travel
through Earth,
but not
through the
core.
Travels only on Earth’s
surface
6. Which seismic wave
only travel on the
earth surface?
Seismic Waves
are produced by Earthquakes
Body Waves
P-Wave
S-Wave
7. What are the two
types of surface
waves?
Surface Waves
Rayleigh
waves
Love
waves
Refraction
is the bending of
light.
Pencil looks
nearer to the
surface.
Pencil looks
distorted.
Surface
waves
are seismic
waves that
stays on the
surface.
8. Which seismic wave stay on
Earth’s Surface?
S waves
cannot
penetrate
the liquid
outercore.
P-wave
9. Which seismic wave refracts and
cannot penetrate the outer core?
P-wave
P waves
also
refracts
but is able
to
penetrate
the core.
10. Which seismic wave can
penetrate the core but refracts?
11. In what directions do the
P, S, and Surface waves
move?
sideways
Right
angle
rolling
P waves - compress and expand the
ground like a accordion
S waves - vibrate from side to side as
well as up and down
Surface waves - make the ground roll like
ocean waves
12. What Are Seismic
Waves?
Seismic waves are the waves of
energy caused by
EARTHQUAKES or the sudden
breaking of rock within the earth or
an explosion.
13. Which is faster S
or P wave?
13 minutes
4000 km
7 minutes
4000 km
There are different types of seismic
waves based on the movement . The
two major types are body waves ( S
and P waves ) and surface waves.
Body waves can travel through earth
inner layers while surface waves can
travel only on the surface of the land.
Solid
Crust
Partly melted
asthenosphere
Lower
mantle
Core
S-waves do not
penetrate the
core
14. Where do
seismic waves
travel slowest
and fastest?
Explain.
Seismic wave travel
faster in solids.
Figure 19-11, page 504
Observations of seismic
wave velocities have
enabled scientists to
subdivide Earth’s interior
into various layers.
15. Which type of
wave can
penetrate the
outer and inner
core?
16. What happens
to S and P
waves as they
travel inside
earth?
Figure 10-10, page 503
Refraction or bending of waves
provide scientists information
on the composition and interior
of Earth.
Refraction
Refraction
is the bending of
light.
Pencil looks
nearer to the
surface.
Pencil looks
distorted.
Refraction is the
bending of light.
17. How are we affected by Earthquakes?
17. How are we affected by Earthquakes?
Liquefaction
tsunami
Destruction
of properties
landslide
avalanche
17. How are we affected by Earthquakes?
Liquefaction
Soil turns to mud.
http://science.howstuffworks.com/nature/natural-disasters/planelanded-in-earthquake1.htm
17. How are we affected by Earthquakes?
tsunami
http://leamichelles.blogspot.com/2011/07/japan-earthquake-and-tsunami-2011.html
17. How are we affected by Earthquakes?
Destruction of properties
http://blog.teacherbentum.com/hello-world/
17. How are we affected by Earthquakes?
landslide
http://robz92.wordpress.com/
17. How are we affected by Earthquakes?
avalanche
http://www.slcoem.org/Hazards.html
17. How are we affected by Earthquakes?
Liquefaction
tsunami
Destruction
of properties
landslide
avalanche
18. What are earthquake waves?
18. What are earthquake waves?
Earthquakes waves
are known as
seismic waves.
19. How fast are seismic waves?
13 minutes
9 minutes
3 minutes
23 minutes
16 minutes
5 minutes
19. How fast are seismic waves?
Seismic waves travel
at a speed of
8 kilometers/second
or 5 miles/second.
20. How are the layers of Earth different from one another?
20. How are the layers of Earth different from one another?
Crust is the thinnest layer
and mostly made of rocks,
the mantle is the thickest
layer, the outer core is liquid
iron while the inner core is a
spinning solid iron.