Week 3 Sound
Task 1 Pop Quiz  Conceptual Model of Heat Transfer
On a Left Side page within your work on Heat Transfer;
Sketch a cartoon of each of the following. Use a tennis ball to represent heat energy and the students in the room to represent the particles of a material transferring heat.
Sketch a cartoon of each of the following. Use a tennis ball to represent heat energy and the students in the room to represent the particles of a material transferring heat.
 Conduction
 Convection
 Radiation
 Evaporation
Task 2 Sound Energy  some characteristics of sound energy
Use a tuning fork, resonance boxes, a beaker of water, guitar, the videos below and the text, page 111 to articulate how sound energy is produced.
(The website had problems loading these videos So click on the link.)
Demonstration of a bell in a vacuum https://www.youtube.com/watch?v=_ckjttBin58
Sound Vibration visualisations https://www.youtube.com/watch?v=6f0hsbFHYvs
Sound is produced by a vibrating object.
Sound can travel through a solid, liquid and a gas but not a vacuum. So does sound energy require particles in order to be transferred?
Sound travels from the vibrating source by waves.
Sound waves transfer energy
(The website had problems loading these videos So click on the link.)
Demonstration of a bell in a vacuum https://www.youtube.com/watch?v=_ckjttBin58
Sound Vibration visualisations https://www.youtube.com/watch?v=6f0hsbFHYvs
Sound is produced by a vibrating object.
Sound can travel through a solid, liquid and a gas but not a vacuum. So does sound energy require particles in order to be transferred?
Sound travels from the vibrating source by waves.
Sound waves transfer energy
sound_longitudinal_wave_images.docx  
File Size:  344 kb 
File Type:  docx 
Task 3 Sound Energy  how is sound energy transferred from the source to a reciever?
Some terminology of sound waves.
Longitudinal wave  the direction of the pulse and the direction the wave travels is the same.Ref
wavelength  the distance between either two compressions or two rarefactions
sound frequency  the time for one wavelength to pass a point. We hear this as a change in pitch
sound amplitude  we hear this as a change in volume
sound velocity  the time it takes for a compression or rarefaction to travel the distance from the source.
Slinky Longitudinal waves  https://www.youtube.com/watch?v=GKzpVUUrwM8
Longitudinal wave  the direction of the pulse and the direction the wave travels is the same.Ref
wavelength  the distance between either two compressions or two rarefactions
sound frequency  the time for one wavelength to pass a point. We hear this as a change in pitch
sound amplitude  we hear this as a change in volume
sound velocity  the time it takes for a compression or rarefaction to travel the distance from the source.
Slinky Longitudinal waves  https://www.youtube.com/watch?v=GKzpVUUrwM8
Wavelength and Frequency
Amplitude and Volume

Task 4 Reflection and Note Taking
Science Text 4.2 Sound page 111 to 117
On a new Rightside pages 1. Write the heading of the chapter 2. Write the subheading. Read, cover write, check your notes. Make sure that you have included each bold word in your notetaking. 3. On the corresponding Leftside pages Text Page 120 complete questions 1 to 17 Finish the notetaking and questions for homework if you cannot complete it during class. 
Task 5 Pop Quiz Sound
Complete on the LeftSide page next to the notes that you took from the text.
Sound is transferred by __________________________ waves.
Longitudinal waves transfer energy in the _______________ direction in which the vibration moves. This creates compressions and ____________________.
The distance between each compression is called the _____________________________ .
Wavelengths are measured in the unit ________________________ .
The number of wavelengths passing a point in a second is called the ________________________ of the wave.
Frequency is measured in the unit ______________________________ .
Longitudinal waves transfer energy in the _______________ direction in which the vibration moves. This creates compressions and ____________________.
The distance between each compression is called the _____________________________ .
Wavelengths are measured in the unit ________________________ .
The number of wavelengths passing a point in a second is called the ________________________ of the wave.
Frequency is measured in the unit ______________________________ .
Task 6 The Oscilloscope and Transverse Waves
Types of waves.
From your note taking you know that there is another type of wave called a transverse wave.
Use a piece of graph paper to sketch this wave form and label its parts.
There are two characteristics of sound that we can represent on a transverse wave.
Volume is related to amplitude of the wave.
If the volume increases the amplitude of the
wave ____________________________ .
This is called a ______________ relationship.
Pitch is related to wavelength of the wave.
If the pitch increases the wavelength
_______________________ .
This is called a ______________ relationship.
Use the same scale on the axes and draw a wave that has the same volume as the wave on your graph paper, but a higher pitch.
Use the same scale on the axes and draw a wave that has the same pitch as the wave on your graph paper, but a higher volume.
Use the Text page 114, Figure 4.2.8 to help you.
Refer to our Website page on Waves
From your note taking you know that there is another type of wave called a transverse wave.
Use a piece of graph paper to sketch this wave form and label its parts.
There are two characteristics of sound that we can represent on a transverse wave.
Volume is related to amplitude of the wave.
If the volume increases the amplitude of the
wave ____________________________ .
This is called a ______________ relationship.
Pitch is related to wavelength of the wave.
If the pitch increases the wavelength
_______________________ .
This is called a ______________ relationship.
Use the same scale on the axes and draw a wave that has the same volume as the wave on your graph paper, but a higher pitch.
Use the same scale on the axes and draw a wave that has the same pitch as the wave on your graph paper, but a higher volume.
Use the Text page 114, Figure 4.2.8 to help you.
Refer to our Website page on Waves
Task 7 Velocity
As you know, one of the principles of the study of science is the measurement of physical quantities. There are four fundamental physical quantities that may be measured.
1. Recall these four fundamental physical quantities and the units that they are measured in. (Hint: these quantities may be easily measured in the school science lab. If these quantities are used in an Investigation we call them variables.
1. Recall these four fundamental physical quantities and the units that they are measured in. (Hint: these quantities may be easily measured in the school science lab. If these quantities are used in an Investigation we call them variables.
Pairs of variables acting together can also produce an effect. These are called compound variables or compound quantities. See Thinking Science Lesson 26.
An example of a compound quantity is Velocity.
We have to calculate velocity of an object, or a wave, by measuring the time it takes to move a distance in a straight line.
The relationship is ;
Velocity = distance in a straight line / time taken
2. List the two fundamental quantities that must be measured so that you can calculate velocity.
3. Show how to work out the units for velocity if distance is measured in meters and time is measured in seconds.
On the school oval we will take these measurements and calculate the velocity of students running, or walking.
If we have time we can measure the variables need to calculate the velocity of sound in air.
Also Refer to Thinking Science Lesson 11
Task 8 Interactive sites; Sounds Amazing and Interactive Ear
You will need to wear earphones for the activities on this website.
Click on the button above and complete all activities.
As you complete each Lesson check the summary and complete the test.
Click on the button above and complete all activities.
As you complete each Lesson check the summary and complete the test.
Click on the button above and complete all activities.
Task Calculations
Wave Calculation Objectives from the Physics Program;
 Calculate the frequency of a wave from its period using the formula: T = 1/f and f = 1/T; where T is period in seconds (s) and f is in Hertz (Hz)
 Calculate the speed of a wave (v) using its wavelength (λ) and frequency (f) And the formula v = λf