Waves - Weebly · Waves Introduction.notebook 43 November 14, 2014 The Nature of Sound What is Sound? Making Sound Waves How Sound Waves Travel Diffraction of Sound Waves What Factors

Waves Introduction.notebook

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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???


PreThoughts:

PostThoughts:


PreThoughts:

PostThoughts:


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BIG Questions???


PreThoughts:

PostThoughts:


PreThoughts:

PostThoughts:

Bell Six


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BIG Questions???


PreThoughts:

PostThoughts:


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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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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November 14, 2014

The Nature of SoundWhat is Sound?

Making Sound Waves

How Sound Waves Travel


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


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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11/14/14


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WHAT DO YOU THINK HAPPENS WHEN A WAVE REACHES A BOUNDARY?


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WAVE PULSE REFLECTION


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WHAT DO YOU THINK HAPPENS WHEN TWO WAVES

MEET EACH OTHER?


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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


b) Wavelength ______ cm c) Amplitude _______ cm d) frequency ______ Hze.) speed _____ cm/s

Wave 3



Wave 4



Wave 5



Wave 6



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

Documents

Waves - Weebly · Waves Introduction.notebook 43 November 14, 2014 The Nature of Sound What is Sound? Making Sound Waves How Sound Waves Travel Diffraction of Sound Waves What Factors