Posted by: mrborden | February 13, 2012

Earthquakes and the scales that measure their intensity


Feb 17
QFD: We never know the worth of water till the well is dry. ~Thomas Fuller
?FD: What do earthquake scales measure?
Objective: ESS3d. Students know why and how earthquakes occur and the scales used to measure their intensity and magnitude Day 2 of 2 ( finish as homework)
1) finish perfect paragraph
2) handout Richter scale and moment magnitude scale
3) Draw, color and label page 165 (Earthquake safe house)

Feb 16
QFD: Education consists mainly of what we have unlearned. ~Mark Twain
?FD: An earthquake occurs at a weak point in the ground which is called a?
Objective: ESS3d. Students know why and how earthquakes occur and the scales used to measure their intensity and magnitude
1) finish perfect paragraph
2) handout Richter scale and moment magnitude scale
3) Draw, color and label page 165 (Earthquake safe house)

Feb 15 (min day)
QFD: In the spider-web of facts, many a truth is strangled. ~Paul Eldridge’
?fd: what type of seismic wave travels through solids , liquids, and gases?
Objective: ESS3d. Students know why and how earthquakes occur and the scales used to measure their intensity and magnitude
air quality in so cal
1) finish notes (25) points moment magnitude scale, SR 4 Questions
2) perfect paragraph with the words from yesterday (50) points
3) copy picture of seimic waves

Feb 14 Happy V day!
Qfd: Modern technology, Owes ecology , An apology. ~Alan M. Eddison
?FD: When two converging oceanic plates collide, what structure is formed?
Objective: ESS3d. Students know why and how earthquakes occur and the scales used to measure their intensity and magnitude
1) Read pgs 154-158
2) cornell notes + vocab matrix
3) homework section review pg 159
Notes pg 154-158

Focus – point beneath the surface where the rocks break
Epicenter – directly above the focus on the surface where energy is released
Seismic waves carry the energy created by the fracture of the rocks from the focus toward the surface
Primary waves – (p Waves) First to arrive because they can travel through solids, liquids and gases and contract and expand buildings on the surface.
Secondary waves (s waves) seismic waves that vibrate from side to side, s waves travel through solids and gases but not liquids areas inside earth.
Surface waves – (l waves) move more slowly and arrive last. Surface waves cause sever ground movement.
Most damage on the surface is caused by these surface waves.
Seismograph – device used to measure the magnitude of an earthquake.
The paper that the seismograph writes onto is called a seismogram.
3 scales that measure earthquakes are the Richter scale, Mercalli scale. and the moment magnitude scale
Magnitude – earthquakes strength based on seismic waves
Mercalli scale – measures the intensity felt by people and building ( 1-12)
Richter scale – measurement of seismic waves by a seismograph (1-10)
Moment magnitude scale – used currently by geologists , this scale uses all information , combination scale (1-10)
Difference between a 5.0 and 6.0 quake is 32X stronger and 1000 X stronger than a 4.0
The minimum number of seismographs needed to detect the epicenter of an earthquake is 3 (fig17 pg 159)
The point where the three circles intersect is the epicenter.







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Responses

  1. hey mr.b i could never find my quiz in the pile

    • i will find it tomorrow or will tell your grade. it may have been mixed up in another class.
      sorry

      • okay thanks borden


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