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Waves
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Waves Vocabulary 11/4/13
Wave Vocabulary.doc
To watch Untamed Science: 1. Log into Pearson Success Net 2. Go To: Interactive Digital Path 3. Go to the Big Question 4. Click 2nd Untamed Science Tab
Extreme Waves
http://www.pearsonsuccessnet.com/snpapp/learn/navigateIDP.do?method=vlo&internalId=140711136000051&isHtml5Sco=false&fromTab=DONETAB
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BIG Questions???
1.What forms a mechanical wave?
PreThoughts:
PostThoughts:
2. What are the 3 types of Mechanical waves
PreThoughts:
PostThoughts:
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BIG Questions???
1.What forms a mechanical wave?
PreThoughts:
PostThoughts:
2. What are the 3 types of Mechanical waves
PreThoughts:
PostThoughts:
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BIG Questions???
1.What forms a mechanical wave?
PreThoughts:
PostThoughts:
2. What are the 3 types of Mechanical waves
PreThoughts:
PostThoughts:
Bell Six
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BIG Questions???
1.What forms a mechanical wave?
PreThoughts:
PostThoughts:
2. What are the 3 types of Mechanical waves
PreThoughts:
PostThoughts:
Bell Seven
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WHAT IS A WAVE?
• a disturbance • created by a source• travels through a medium
A ripple forms when raindrops hit the pond.What is the source?What is the medium?
(move the green dot here to reveal answer)
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Waves_Notes.doc
Surface
Transverse
Longitudinal
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In which direction is the wave moving?In which direction are the people moving?
TRANSVERSE WAVES
Animation courtesy of Dr. Dan Russell, Kettering University
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PARTS OF A TRANSVERSE WAVE
amplitudecrest
troughwavelength
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In which direction is the wave moving?In which direction are the particles moving?
LONGITUDINAL WAVES
Animation courtesy of Dr. Dan Russell, Kettering University
(move the green dot here to reveal answer)
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News You Can Use > Unless you’re a competitive swimmer, you probably didn’t even know that some swimming pools are faster than others. But if you’re an
Olympic swimmer, like Missy Franklin, then you know that pool design can affect swimming speed. It all has to do with waves. > Watch this video to see what makes some swimming pools faster than others:http://www.nbclearn.com/summerolympics/cuecard/59599
Show What You Know Learn more about fast pool design at the link below. Then answer the following questions.
> http://www.browndailyherald.com/2012/04/16/poolfeaturesfasttechnology/What is a wave? Swimmers disturb the water and cause waves. How does this affect their speed? Identify features of fast pools and explain how they minimize waves. Why are the outer lanes of a pool often left empty during swimming competitions?
Speed Pool
http://www.nbclearn.com/summerolympics/cuecard/59599
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Calculating wavesAmplitude measures the energy
of a transverse waveIt is measured from
the equilibrium / rest to the
crest or trough
Wavelength: The distance between twocorresponding (similar spots)On the wave.
crest to crest
trough to trough
compression to compression
Frequency : The number of waves thatpass a certain spot in
a certain amount of timef= Speedwavelength
Speed: Is how far the wave travelsIn a given time Determine
/
Unit of measurement ismeters / second or hertz
Hz
speed=wavelength x frequency
1m X 1 Hz
or hertz
Hz
Wavelength:Is the distance between two corresponding parts of the wave trough to trough or crest to crest
Wavelength= Speed/Frequency
or
____
SW=F
m
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Wave Worksheet (1).doc
The pages that follow are the answers!
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11/5/14
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11/5/14
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click for movie by Dr. Michael R. GallisPenn State Schuylkill
WAVE PULSES ON A SPRING
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click for movie by Dr. Michael R. GallisPenn State Schuylkill
PERIODIC WAVES ON A SPRING
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Waves on a string interactive lab
Waves on a string Student Phet lab sheet
The pages that follow are the answers
http://phet.colorado.edu/en/simulation/wave-on-a-string
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1. What happened to the amplitude?
3. Where did The energy go?
2. What does that mean about
the energy?
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Pull
Properties of Transverse WavesWavelength is the distance from one point to the next point in the cycle
Crest
Trough Amplitude is the amount the wave is displaced
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Properties of Surface Waves
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PARTS OF A LONGITUDINAL WAVE
compression rarefaction
wavelength
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Properties of Longitudinal Waves
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The Nature of SoundWhat is Sound?
Making Sound Waves
How Sound Waves Travel
Diffraction of Sound Waves
What Factors Affect the Speed of Sound
Temperature
Stiffness
Density
It is a disturbance
in a medium(solid,liquid, or gas)That formsVibrations. The repeated.
Vibrations form a wave thatcarries energy
A disturbance ina medium. Which moves
The mater in the medium
parallel to the rest position.When the matter is pushedtogether they are called
a compression. AfterThe compression the
Matter bounces backto its rest position called
a rarefraction
They carryenergy through
a wave They vibrateparticles in the medium
can travel
through solids,
liquids gasses
Longitudinal wavesdo not travel in only
one direction.They canbend and travel around
corners in all directions
It's a longitudinal wave
Longitudinal
The colder the
temperature the
Slower the speed of
longitudinal wave.
Longitudinal waves
travel faster
in medium that
is more stiff
(solid)
The more dense
a medium is
The slower the
longitudinal wave
Longitudinal
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The Nature of SoundWhat is Sound?
Making Sound Waves
How Sound Waves Travel
Diffraction of Sound Waves
What Factors Affect the Speed of SoundTemperature
Stiffness
Density
(solid,That formsVibrations. The repeated.
Vibrations form a wave that
carries energy
The sound waves
longitudinal waves travel
slower when the
temperature is colder.
Longitudinal waves
travel faster through
solid stiff matter
better than liquidsand gasses.
: the moredense an area theSlower the sound
wave (longitudinal wave)(Mrs. Jeff co H's
very dense
room
compared to
Mrs. McClure s
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What is Sound
Making Sound Waves
How sound waves travel
Diffraction of Sound Waves
What factors Affects the Speed of Sound
Temperature
Stiffness
Density:
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sound graphic organizer.doc
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Pitch
the frequency of
a longitudinal affects The
pitch. The more
frequent The higher
the pitch The lessfrequent thelower the pitch
. high pitch
pitch
higher
lower
what affect loudness
E loudness depends
on the intensityOf a sound waveThe greater the
amplitude of the waveThe louder it sounds
intensitythe amount
of energy a sound wave
has in a sec as it travelsThrough an area.
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pg 279
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Tuning Fork Lab
Tuning Fork Lab Sheet
Longitudinal Waves Compressions
FrequencyPitchRarefactions
Energy
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11/14/14
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WHAT DO YOU THINK HAPPENS WHEN A WAVE REACHES A BOUNDARY?
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click for movie by Dr. Michael R. GallisPenn State Schuylkill
WAVE PULSE REFLECTION
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WHAT DO YOU THINK HAPPENS WHEN TWO WAVES
MEET EACH OTHER?
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click for movie by Dr. Michael R. GallisPenn State Schuylkill
CONSTRUCTIVE INTERFERENCE
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Attachments
Wave Vocabulary.doc
Waves_Notes.doc
Speed Pool
Wave Worksheet ﴾1﴿.doc
Waves on a string
Waves on a string Student Phet ﴾3﴿.doc
sound graphic organizer.doc
Extreme Waves
Tuning+Fork+lab.doc
Amplitude
Compression
Rarefaction
Crest
Surface Wave
Energy
Transverse Wave
Longitudinal Wave
Trough
Mechanical Wave
Vibration
Medium
Wave
Wavelength
SMART Notebook
Waves Notes
Summarize the creation of a wave.
Explain the relationship between a wave’s amplitude and the energy carried by the wave.
Identify the three types of waves and label their components.
Describe each of their movements.
List all three types of waves and give and example of each.
1.
2.
3.
4.
Similarities
________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
________________________
________________________
________________________
Difference
________________________________________________________________________________________________________________________
Difference
________________________________________________________________________________________________________________________
Difference
________________________
________________________________________________________________________
________________________
SMART Notebook
http://www.nbclearn.com/summerolympics/cuecard/59599
Wave Worksheet
One full wave (cycle)
Wave train – two or more waves
Amplitude – measures the energy of a transverse wave a) measured from the equilibrium position to the top of a crest or the bottom of a trough (see vertical arrow)Wavelength – length of a single wave cycle (horizontal arrow double sided arrow)
Frequency-# of waves that pass a point in a given amount of time
Speed = wavelength x frequency
The time from the beginning to the end of the wave train in each situation is 1 second.
Wave 1
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm c) Amplitude _______ cm
d) frequency ________ Hze) speed _______ cm/s
Wave 2
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm c) Amplitude _______ cm d) frequency ______ Hze.) speed _____ cm/s
Wave 3
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm c) Amplitude _______ cm d) frequency ______ Hze.) speed _____ cm/s
Wave 4
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm c) Amplitude _______ cm d) frequency ______ Hze.) speed _____ cm/s
Wave 5
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm c) Amplitude _______ cm d) frequency ______ Hze.) speed _____ cm/s
Wave 6
a) How many waves are there in this wave train? _____
b) Wavelength ______ cm c) Amplitude _______ cm d) frequency ______ Hze.) speed _____ cm/s
Wave 7If this entire wave train is 30 meters long what is the wavelength of this wave? _______
Problems: (Do these on a separate sheet of paper. Show equation, work, final answer with correct units.) 1. What is the wavelength of a sound wave with a frequency of 50 Hz? (Speed of sound is 342 m/s)
2. A sound wave in a steel rail has a frequency of 620 Hz and a wavelength of 10.5 m. What is the speed of sound in steel?
3. Determine the frequency of a microwave 6.0 cm in length. ( A microwave is an electromagnetic wave. It travels through space at a speed of 3.0 x 10 ^8 m/s)
4. What is the period of the microwave in problem 3?
PAGE
1
SMART Notebook
http://phet.colorado.edu/en/simulation/wave-on-a-string
Waves on a String Simulation
Student guide:
Name:____________________
Discuss the words in the box.
· review we have already covered and new you will learn today
Guiding Question:
How do the properties of amplitude and frequency affect wavelength?
Start:
1. Click on the first link
2. For this activity you will be collecting data to explore three properties of a wave.
3. Explore the simulation with your partner. Be sure to click on all the buttons.
4. For the first set of investigations, we will look at amplitude.
· you need to be on
· The rest of your screen should be set up like this:
Look over the data table, on the back, and discuss how get the data you need.
moves the wave.
Amplitude setting
Height of wave at the start
(be sure your ruler is lined up correctly)
Distance ring moves on pole (end)
100
50
5
Discuss what happened to the energy at the end of the wave when we changed the amplitude. ______________________________________________________________________________________________________________________________________________________________________________________________________
5. Repeat number 4 – using and then Why didn’t we use these options for the experiment with the amplitude button?__________________________________________________________________
Teacher
Check- point
6. For this next part we will investigate wavelength.
· You need to be on
· The rest of your screen should be set up like we did for number 4.
· Try out the button after you hit pause. This may be useful for collecting data.Data:
7. Talk about the wavelength of the two waves you measured.
How were the wavelengths similar and how they were different? ______________________________________________________________________________________________________________
Teacher check-off
Day 2: For the third set of investigations, we will look at frequency.
· you need to be on
· open both the ruler and timer
· controlled variables: Amplitude and damping should be left on 50 and tension stays on “high”
· Remember, to stop or slow the wave use pause/play and .
1. Look over the data table and discuss how you will collect the data you need.
2. Before you begin… try a little practice using the timer:
· Turn the timer on, off and reset the timer while waves are moving.
3. Practice counting waves passing a given point:
· Move the vertical ruler so that it is along the wave’s path. This will be the point where you watch waves pass and count them. Count 5 waves passing the ruler. Change the frequency and count again.
4. Fill in the table by working together counting the waves and using the timer.
Data:
frequency
Time interval
Number of waves:
Average number of waves counted in 10 second period
Number of waves in 1 second
frequency**
Trial #1
Trial #2
Trial #3
50
10 seconds
10
10 seconds
100
10 seconds
*To find frequency, divide the average number of waves counted by the time interval.
5. Talk about the data.
· Decide on a way your group can explain wave frequency to the class.
· Write your idea(s) on the lines.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
Frame: Our data show that the higher the number chosen for the frequency on the slider, the _________________ the number of waves passing ____________________ in a certain amount of ________________________.
6. Use arrows, or draw on the wave, to show what will happen when the amplitude is increased:
7. Use arrows, or draw on the wave, to show what will happen when the frequency is increased:
Review: New: (check-off at the end)
crestamplitude
troughfrequency
line of originoscillate vs. pulse
Phet Waves on a string
wavelength = _______ cm
Wavelength = _____ cm
Line of --origin------
Line of --origin------
1
SMART Notebook
NAME:
Sound
Properties of Sound: Big Ideas-
What affects Pitch?
Measuring Loudness:
What Causes the Doppler Effect?
What affects Loudness?
SMART Notebook
http://www.pearsonsuccessnet.com/snpapp/learn/navigateIDP.do?method=vlo&internalId=140711136000051&isHtml5Sco=false&fromTab=DONETAB
Name:
Period:
Tuning Fork Lab
What is a tuning fork?
Tuning forks are U-shaped metal objects with a handle. They can be made of steel or aluminum. A tuning fork can give you a standard pitch. Musicians use them to tune their instruments.
Most tuning forks have their pitch (or frequency) stamped on the handle. A tuning fork marked 256 gives off 256 vibrations per second and has a frequency of 256 Hz. This is equal to “C” on the musical scale. A tuning for marked 384 give off
vibrations per second and has a frequency of
Hz. This is equal to “G” on the musical scale.
Question: How do the size and pitch of a tuning fork effect its sound and the waves it creates?
Materials:
-3 different tuning forks
-1 cup of water
-paper towels
Procedure:
1. You and your partner will test the sound of 3 different tuning forks. Write a description of each tuning fork in the chart. Use this chart to record your observations.
2. Complete the “Listen” section of the chart for each tuning fork.
3. Tap each tuning fork against the sole of your shoe and listen. Record your observations and describe the pitch in the chart.
4. Complete the “Water” section of the chart for each tuning fork.
5. Fill a cup with 4 cm of water.
6. Tap each tuning fork against the sole of your shoe and place the tips of the prongs in the water. Record your observations in the chart.
Conclusion:
1. Rank you tuning forks from lowest to highest pitch.
2. Which tuning fork made the most waves in the water?
3. Which tuning fork made the fewest waves?
4. Based on your observations, how do the size and pitch of a tuning fork affect its sound and the waves it creates?
Observation Chart
Description of tuning fork (pitch, length, thickness)
Observations
(What do you see or hear?)
Description of the pitch (low, med, high)
Listen Tuning Fork #1
Listen Tuning Fork #2
Listen
Tuning Fork #3
Water Tuning Fork #1
Water Tuning Fork #2
Water
Tuning Fork #3
HI!!! Happy Lab Day!!
Please get out your homework and pencil.
Today~
Tuning Fork Lab!!! YAY!!!
We are going to figure out how pitch and frequency are related.
When you are finished with the lab, try the bonus question:
BONUS!!!
Find 2 tuning forks of the same pitch. Tap one against your shoe and hold it near the other. What happens? (HINT: page 49 in your textbook)
SMART Notebook
Page 1: Nov 5-11:17 AMPage 2: Nov 5-11:19 AMPage 3: Nov 6-6:25 AMPage 4: Nov 6-8:40 AMPage 5: Nov 6-8:40 AMPage 6: Nov 6-8:40 AMPage 7: What is a wave?Page 8: Nov 7-6:35 AMPage 9: Transverse WavesPage 10: Transverse PartsPage 11: Longitudinal WavesPage 12: Nov 7-2:10 PMPage 13: Oct 28-2:29 PMPage 14: Oct 29-2:45 PMPage 15: Oct 29-2:46 PMPage 16: Nov 12-6:44 AMPage 17: Nov 12-1:54 PMPage 18: Nov 12-12:48 PMPage 19: Nov 12-8:04 AMPage 20: Nov 12-7:48 AMPage 21: Nov 13-7:42 AMPage 22: Nov 14-9:48 AMPage 23: Nov 5-2:41 PMPage 24: Nov 5-2:41 PMPage 25: Wave PulsesPage 26: Periodic WavesPage 27: Nov 15-6:32 AMPage 28: Nov 7-9:05 AMPage 29: Nov 15-2:55 PMPage 30: Nov 15-2:55 PMPage 31: Nov 18-2:51 PMPage 32: Nov 10-2:30 PMPage 33: Nov 10-2:31 PMPage 34: Nov 10-2:32 PMPage 35: Nov 11-2:32 PMPage 36: Nov 11-2:33 PMPage 37: Nov 11-2:33 PMPage 38: wave propertiesPage 39: Sep 28-9:15 AMPage 40: Longitudinal PartsPage 41: Sep 28-9:05 AMPage 42: Nov 20-6:30 AMPage 43: Nov 20-8:41 AMPage 44: Nov 21-11:42 AMPage 45: Nov 21-9:06 AMPage 46: Nov 13-9:14 AMPage 47: Nov 21-2:04 PMPage 48: Nov 13-2:31 PMPage 49: Nov 21-2:04 PMPage 50: Nov 13-2:32 PMPage 51: Nov 14-2:27 PMPage 52: Nov 14-2:28 PMPage 53: Nov 14-2:28 PMPage 54: May 4-7:17 AMPage 55: Pulse ReflectionPage 56: May 4-7:17 AMPage 57: Constructive InterferencePage 58: Sep 28-12:15 PMPage 59: Sep 28-6:59 AMAttachments Page 1