Content Purpose Explore the scientific theory of plate tectonics by describing how the movement of Earths crustal plates causes both slow and rapid changes in Earths surface including volcanic eruptions earthquakes and mountain building ID: 801708
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Slide1
EARTHQUAKES:WHY? AND HOW?
Slide2Content Purpose:
Explore the scientific theory of plate tectonics by describing how the movement of Earth's crustal plates causes both slow and rapid changes in Earth's surface, including volcanic eruptions, earthquakes, and mountain building.
Slide3What are earthquakes?
Earthquakes are the vibrations in the ground that result from movement along breaks in Earth’s lithosphere
Slide4EARTHQUAKES
Slide5When the force on rocks is great enough, they break, producing vibrations called ____.a. faults c
. strains
b. earthquakes d. stresses
Slide6Where do they occur?
1.
Plate boundaries
Deepest
earthquakes
=
Convergent boundaries
(think oceanic plates)
Shallow earthquakes = Divergent boundaries (mid-ocean ridges) & transform boundaries (San Andres Fault).
2.
Rock Deformation
Force x Pressure = rock deformation
3.
Faults
A break in Earth’s lithosphere where one block of rock moves toward, away from, or past another.
Slide7Three types of faults:Strike-slip
Normal
Reverse
See diagram on page 263 of the text book!
Slide8Along a(n) ____ fault, rock above the fault surface moves downward in relation to rock below the fault surface.a. normal c. elasticb. reverse d. strike-slip
Slide9PLATE TECTONIC STRESSES
Slide10EARTHQUAKE WAVES
Slide11Slide12EARTHQUAKE WAVES
Slide13EARTHQUAKE WAVES
Slide14Question: How might knowing what type of material each wave can penetrate be useful to scientists?
Slide15Slide16Slide17Slide18Slide19Slide20Moment Magnitude
https://
www.youtube.com/watch?v=yNN7eDXzlMo
Slide21See page 269
“We all got scared and ran outside. The house was ok, but our old shed fell over.” This quote would help a researcher to place an earthquake on which scale?
a. Modified
Mercalli
Scale
c. moment
magnitude scale
b. Richter
Scale
d. all
of the above
The magnitude of an earthquake is measured by the ____.a. Richter scale c. modified
Mercalli
scale
b.
moho
discontinuity d. elastic limit
Slide22HOW TO READ SEISMOGRAMS
Slide23Slide24EARTHQUAKE DAMAGE
Slide25LIQUEFACTION
Slide26EARTHQUAKE DAMAGE
Slide27https://
www.youtube.com/watch?v=yOGoKCK17a4
Slide28What I Learned Today!
Write a Sum-it-up about what you learned. You may use this
ppt
&/or your text book.
Be sure to use vocabulary terms and examples.