
Earthquakes
Presentation
•
Science
•
4th Grade
•
Practice Problem
•
Hard
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Used 15+ times
FREE Resource
32 Slides • 8 Questions
1
Earthquakes
Map earthquakes, model earthquake movement, and reduce earthquake damage
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3
Vocabulary
fault
seismologist
4
Multiple Choice
Do earthquake locations follow a pattern?
I think earthquake locations follow a pattern. They usually occur near certain land and ocean features.
I think there is no pattern to earthquake locations. They can happen anywhere in the world.
5
faults
breaks or cracks where plates come together
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seismologist
a science that deals with earthquakes and with artificially produced vibrations of the earth
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8
Multiple Select
Tick the correct statements:
Earth's plates are made up of huge slabs of solid rock.
Earth's crust is made up of huge slabs of solid rock.
Earth's plates can slide slowly past each other.
Earth's plates can also push together or move under or over each other.
9
Earthquakes
Movements in Earth's crust caused by a sudden shift of Earth's plates
Earth's plate movement puts stress on rock, and earthquakes occur when the crust shakes by the release of the accumulated energy.
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Multiple Choice
Earthquakes
Earthquakes have the same strength and shake at the same speed.
Earthquakes have the same strength and shake at different speeds.
Earthquakes have different strengths and shake at the same speed.
Earthquakes have different strengths and shake at different speeds.
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Vocabulary
amplitude
magnitude
seismic wave
seismograph
transverse wave
wavelength
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amplitude
a measure that relates to the amount of energy of a wave
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magnitude
the amount of energy released by an earthquake
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seismic wave
a vibration caused by an earthquake
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transverse wave
a wave that vibrates perpendicular to the direction that the energy moves
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wavelength
the distance between wave crests or troughs
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Multiple Select
Tick the correct statements:
Only certain waves transfer energy.
All waves transfer energy.
Only certain waves transfer energy without permanently moving the material through which they travel.
All waves transfer energy without permanently moving the material through which they travel.
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Answers:
1: __________
2: __________
3: __________
4: __________
5: __________
6: __________
7: __________
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Answers:
1: Wavelength
2: compression
3: rarefaction
4: amplitude
5: crest
6: wavelength
7: trough
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Record and measure earthquakes
Seismograph: mesuring seismic waves
Richter scale: measuring magnitude (the largest movement)
Mercalli scale: measuring what people felt and what happened during an earthquake (I to XII)
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Mercalli scale
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What do you think happens to the amplitude of an earthquake wave when its magnitude increases?
Answer: Increase or decrease
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Multiple Choice
_____ move material back and forth.
Transverse waves
Longitudinal waves
Wavelengths
None of the above
31
Multiple Choice
Which earthquake releases more energy?
an earthquake of 6.0
an earthquake of 7.0
an earthquake of 5.0
32
Multiple Select
What can we do to reduce earthquake damage?
Building only in areas where there has been no record of earthquakes
Designing buildings that can resist forces from the side
Connecting beams and columns with diagonal pieces
Preparing for earthquakes by paying close attention to the weather
Raising the floor of houses above ground when building near coastlines
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Safe Structures
Reinforced concrete, metal, and wood
short or tall buildings
Bridges: motion dampeners, rubber joints
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Buildings need to resist LATERAL FORCES in earthquakes
bracing
shear wall
damper
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bracing
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shear wall
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damper
40
Multiple Choice
____ is made of diagnoal pieces connecting beams and columns. It comes in several shapes.
A lateral wall
A damper
A shear wall
Bracing
Earthquakes
Map earthquakes, model earthquake movement, and reduce earthquake damage
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