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Earthquakes

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Title: Earthquakes


1
Chapter 8
Earthquakes
Preview
CRCT Preparation
2
CRCT Preparation
Chapter 8
1. What happens when two tectonic plates push
against each other? A Potential energy is
released. B Kinetic energy is released. C
Potential energy builds up. D Nothing happens.
3
CRCT Preparation
Chapter 8
1. What happens when two tectonic plates push
against each other? A Potential energy is
released. B Kinetic energy is released. C
Potential energy builds up. D Nothing happens.
4
CRCT Preparation
Chapter 8
2. A seismologist is setting up an earthquake
research laboratory. Which of the following
pieces of laboratory equipment would be the most
useful for measuring the magnitude of an
earthquake? A Richter scale B seismograph C shake
table D epicenterometer
5
CRCT Preparation
Chapter 8
2. A seismologist is setting up an earthquake
research laboratory. Which of the following
pieces of laboratory equipment would be the most
useful for measuring the magnitude of an
earthquake? A Richter scale B seismograph C shake
table D epicenterometer
6
CRCT Preparation
Chapter 8
3. An earthquake model that uses gelatin to
simulate rock is limited because A rock does not
shake during earthquakes. B gelatin has a
different density than rock has. C you cannot eat
rock. D gelatin has a different color than rock
has.
7
CRCT Preparation
Chapter 8
3. An earthquake model that uses gelatin to
simulate rock is limited because A rock does not
shake during earthquakes. B gelatin has a
different density than rock has. C you cannot eat
rock. D gelatin has a different color than rock
has.
8
CRCT Preparation
Chapter 8
4. Earthquake waves that cause the ground to move
up and down, much like ocean waves move water
particles, are known as A S waves. B body
waves. C surface waves. D P waves.
9
CRCT Preparation
Chapter 8
4. Earthquake waves that cause the ground to move
up and down, much like ocean waves move water
particles, are known as A S waves. B body
waves. C surface waves. D P waves.
10
CRCT Preparation
Chapter 8
5. The seismogram shows the ground movement that
occurred during a recent earthquake in
northwestern Georgia. Which wave type caused the
largest ground movements? A P waves C body
waves B S waves D surface waves
11
CRCT Preparation
Chapter 8
5. The seismogram shows the ground movement that
occurred during a recent earthquake in
northwestern Georgia. Which wave type caused the
largest ground movements? A P waves C body
waves B S waves D surface waves
12
CRCT Preparation
Chapter 8
6. As part of an earthquake modeling lab
experiment, Dale must determine the density of a
sample of rock. Density is determined by
dividing the mass of the sample by its volume.
Which pieces of laboratory equipment would be the
best choice for making the necessary
measurements? A beaker, graduated cylinder B
petri dish, balance C balance, graduated
cylinder D graduated cylinder, stopwatch
13
CRCT Preparation
Chapter 8
6. As part of an earthquake modeling lab
experiment, Dale must determine the density of a
sample of rock. Density is determined by
dividing the mass of the sample by its volume.
Which pieces of laboratory equipment would be the
best choice for making the necessary
measurements? A beaker, graduated cylinder B
petri dish, balance C balance, graduated
cylinder D graduated cylinder, stopwatch
14
CRCT Preparation
Chapter 8
7. What is the difference between plastic
deformation and elastic deformation? A In plastic
deformation, tectonic plates move on top of a
layer of plastic rock in elastic deformation,
they remain fixed. B In plastic deformation,
blocks move over one another in elastic
deformation, blocks slide past one another. C In
plastic deformation, earthquakes occur in
elastic deformation, they do not. D In plastic
deformation, rock is reshaped in elastic
deformation, rock is stretched to its breaking
point.
15
CRCT Preparation
Chapter 8
7. What is the difference between plastic
deformation and elastic deformation? A In plastic
deformation, tectonic plates move on top of a
layer of plastic rock in elastic deformation,
they remain fixed. B In plastic deformation,
blocks move over one another in elastic
deformation, blocks slide past one another. C In
plastic deformation, earthquakes occur in
elastic deformation, they do not. D In plastic
deformation, rock is reshaped in elastic
deformation, rock is stretched to its breaking
point.
16
CRCT Preparation
Chapter 8
8. Hebert is drawing a diagram of an earthquake
as part of a field investigation. What label
should Hebert apply to the point inside Earth
where the earthquake begins? A epicenter B
focus C ground zero D plate boundary
17
CRCT Preparation
Chapter 8
8. Hebert is drawing a diagram of an earthquake
as part of a field investigation. What label
should Hebert apply to the point inside Earth
where the earthquake begins? A epicenter B
focus C ground zero D plate boundary
18
CRCT Preparation
Chapter 8
9. Which of the following statements best
describes elastic rebound? A Rock loses cohesion
and allows water to flow into newly opened
spaces. B Rock slips along a fault, releases
energy as seismic waves, and returns to its
original shape. C Rock changes shape, but does
not release significant amounts of energy. D Rock
becomes compacted under pressure and realigns its
mineral grains.
19
CRCT Preparation
Chapter 8
9. Which of the following statements best
describes elastic rebound? A Rock loses cohesion
and allows water to flow into newly opened
spaces. B Rock slips along a fault, releases
energy as seismic waves, and returns to its
original shape. C Rock changes shape, but does
not release significant amounts of energy. D Rock
becomes compacted under pressure and realigns its
mineral grains.
20
CRCT Preparation
Chapter 8
10. The table summarizes the frequency of
earthquakes of various sizes throughout the
world. Based on the data given in the table,
approximately how many earthquakes in the range
of 4.0-4.9 happen each year? A 50 C several
thousand B 400 D several million
21
CRCT Preparation
Chapter 8
10. The table summarizes the frequency of
earthquakes of various sizes throughout the
world. Based on the data given in the table,
approximately how many earthquakes in the range
of 4.0-4.9 happen each year? A 50 C several
thousand B 400 D several million
22
CRCT Preparation
Chapter 8
11. There are three types of faults strike-slip,
reverse, and normal. With what type of plate
motion is each associated? Describe how the
Earths crust is affected by each type of motion.
23
CRCT Preparation
Chapter 8
  • 11. Answer - Full-credit answers should include
    the following points
  • Strike-slip faults occur with transform motion.
    Blocks of the Earths crust slide horizontally
    past one another.
  • Reverse faults occur with convergent motion.
    Blocks are pushed together and (usually) one
    slides under the other.
  • Normal faults occur with divergent motion.
    Blocks are being pulled away from one another.

24
CRCT Preparation
Chapter 8
12. A small earthquake struck Menlo, Georgia, on
April 29, 2003. Menlo was either the
earthquakes focus or its epicenter. Tell which
is correct and explain your answer.
25
CRCT Preparation
Chapter 8
  • 12. Answer - Full-credit answers should include
    the following points
  • An earthquakes focus is the point inside the
    Earth where the earthquake originated it is not
    a point on Earths surface.
  • An earthquakes epicenter is located at the
    point on Earths surface that is directly above
    the point where the earthquake originated.
  • Menlo was the earthquakes epicenter.
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