Transcript WI 04 Shaking Up Waves

Shaking UP Waves
Thursday March 8th, 2012
Warm-up: Read the Introduction to answer the following:
1. What do scientists use to record the
wave generated during an earthquake?
2. What relationship can be studied from the
seismograph?
Objective: SWBAT collect and analyze data IOT
explain the relationship between amplitude, energy,
and magnitude.
While you are eating breakfast in a
small café in southern California, an
earthquake occurs. The ground begins to
shake and your orange juice spills on the
table. Just when you decide to take cover,
the ground settles down and comes to
rest.
Earthquakes are the Earth’s way of
releasing built-up stress in the crust.
Energy that travels through the crust
demonstrates wave properties. Scientists
can record the waves generated during an
earthquake using a device called a
seismograph. The seismogram produced
can be examined in order study the
relationship between the amplitude and
the energy of a wave produced by an
earthquake.
Shaking Up Waves
INBOX
From
We figured out that wavelength and frequency are
related. Do you think any other wave parts and
properties are related?
I don’t know. If frequency is related to something,
maybe amplitude has a connection with something.
Do you think we need to know this information for the
job?
The ad does say “extensive knowledge required.” I
think we should cover all of our bases. I’ll look into
this.
Open your textbook (Sound and Light) to page
27-28. Skim to answer the following:
Explain how earthquake waves transfer
energy. (Answer this in a complete
sentence.)
Earthquakes are generated when:

Stress builds up in the Earth’s rocks and is
released in the form of vibrations.
There are 3 types of seismic waves, they are:

Primary waves (longitudinal), Secondary
waves (transverse), and surface waves
(both).
Not all earthquakes are of the
same strength. Some
earthquakes release more energy
and have a greater magnitude
than others. The Richter scale is
a standard scale used to
compare the magnitude of
earthquakes. A lower number on
the Richter scale implies an
earthquake of a lower magnitude.
Vocabulary Reference
Magnitude
 The amount of energy the earthquake
wave has.
 Measured using the Richter scale.
 (As magnitude increases the amount of
energy released increases)
3. Examine the seismogram on Student
Resource Sheet 1. This seismogram
was recorded on June 26, 1994, in
Berkeley, California. Three earthquakes
of different Richter scale magnitudes
were recorded in a 12-minute period.
The waves produced by each earthquake
are labeled on the seismogram.
STUDENT RESOURCE SHEET 1
SEISMOGRAM
1st
Earthquake- 3.2
3rd Earthquake- 4.2
2nd Earthquake- 2.5
#3
Rank the earthquakes in order of increasing
amount of energy released. Justify your
response using information from the
investigation.
* The 3rd has higher energy going thorough it,
so it’s amplitude is the highest.
RANKING
2nd-1st-3rd
JUSTIFICATION
The 2nd earthquake’s magnitude is
the least, the 3rd is the greatest, and
the 1st is in the middle.
#4
Compare the amplitudes of each of the
earthquakes. Justify your response
using information from the seismogram.
The 3rd earthquake has the greatest
amplitude (4.2), the 2nd earthquake has
the lowest amplitude (2.5), and the 1st
earthquake’s amplitude falls in the
middle (3.2).
#5
Identify the relationship between the
amount of energy in a wave and the
amplitude of the wave. Justify your
response using information from the
investigation.
The greater the amplitude, the greater
the amount of energy in the wave (and
vice-versa).
What will you feel?
 Might not feel the 1st and 2nd earthquake
 Probably will feel the 3rd
What about Maryland?
 New Medrid falt goes through MD
 Runs from Memphis, TN to Western NYS
 Howard County gets the most
 Last Earthquake: October 8, 2007 (1.3) epicenter right
around Randallstown
What is happening right now?....
http://www.mgs.md.gov/seismics/helicorder.php
Shaking UP Waves
Friday March 9th, 2012
Warm-up: *** ANSWER IN COMPLETE SENTENCES***
1. Where do seismic waves transfer energy?
2. Which is greater? An earthquake with
magnitude 3.4 or an earthquake with a
magnitude 1.9?
Objective: SWBAT collect and analyze data IOT
explain the relationship between amplitude, energy,
and magnitude.
Agenda
 Review Short Cycle
 Grade Determination (how to calculate)
 Earthquakes wrap-up
 Brain pop
 Review
 Exit Ticket
Grade Determination
 Add # of multiple choice
correct to BCR pts earned
Ex: 9/10 pts multiple choice
+ 2/3 pts for BCR =
11/13
 Multiply your score by 2!
Ex: 11/13 * 2 = 22/26
24-26 pts
= A
22pts
= B
20pts
= C
18pts
= D
16 and below = E
STUDENT RESOURCE SHEET 1
SEISMOGRAM
1st
Earthquake- 3.2
3rd Earthquake- 4.2
2nd Earthquake- 2.5
Exit Ticket
 Explain why earthquakes of a
higher magnitude cause more
damage. Be sure to include
the following in your response:
 Energy
transfer
 Relationship between
magnitude and amplitude