Basic Waves

PS4.1 Basic Properties of a Wave

​Bellwork 9/29 & 30

​Motion Unit Test Discussion

​Where did it go wrong?
Quizizz Review was not practiced outside of the classroom.
Vocabulary Practice was not practiced outside the classroom.
Reminders were given in class and reminder emails were sent 2x.

Retakes: Unit Test Questions were broken down to give retake scores.
Test 1 (PS2.3 1st Law) and Test 2 (PS2.3 & PS2.4 2nd/3rd Law)

Correction Opportunity:
Located in Schoology in the "Remediation/REDO/Replacement" folder.
Due this Friday, Oct 4!! The grading period ends Friday.

Open Ended

Which graph describes the likely change in the speeds of the ice skater and rollerblader after pushing on the wall? And why?

Waves Unit

Waves Phenomenon
Inquiry Question: What type of energy and forces
caused the Tacoma bridge to be destroyed and how do we
use these same noncontact forces today?
Galloping Gertie

Tacoma Bridge

Standard: PS4.1
Develop and use models to represent basic properties of waves including frequency, amplitude, wavelength, and speed.

Learning Intention
•Develop and use
mathematical
models to show
the basic
properties of
waves
highlighting that
patterns exist
between waves.

Success Criteria
•I can be a
communicator by
using critical
thinking skills in
identifying all the
parts of a
transverse and
longitudinal
wave.

•I can be a
problem solver in identifying all the parts of a mechanical wave.
I can identify the difference between pitch and volume

Focus Question: What type of properties do waves contain?

Activator

Read the event described below, identify on the back of your bellwork sheet how many different waves were present. List all the waves.

Imagine that your family has just
returned home from a day at the beach.
You had fun playing in the ocean under
a hot sun. You put some cold pizza in
the microwave for dinner, and you turn
on the radio. Just then, the phone rings.
It’s your friend calling to ask about
homework.

This Photo by Unknown author is licensed under CC BY.

What are Waves?

Rhythmic disturbances that carry

energy without carrying matter

2 Types of Waves

• Mechanical Waves – need matter (or medium) to

transfer energy

• A medium is the substance through which a wave

can travel. Ex. Air; water; particles; strings; solids;
liquids; gases

• Electromagnetic Waves – DO NOT NEED matter (or

medium) to transfer energy

• They do not need a medium, but they can go

through matter (medium), such as air, water, and
glass

Mechanical

Waves

Waves that need matter
(medium) to transfer
energy:

Examples: Sound
waves, ocean waves,
ripples in water,
earthquakes, wave of
people at a sporting
event

Transverse

(Mechanical) Waves

• Energy causes the matter in the

medium to move up and down or
back and forth at right angles to
the direction the wave travels.

• Examples: waves in water

Multiple Choice

What do waves carry from place to place?

• Energy, but not matter or particles
• Energy and matter or particles
• Matter or particles but not energy
• Neither energy nor matter or particles

Multiple Choice

Waves that require a medium are called 

• mechanical waves
• transverse waves
• light waves
• gamma rays

Parts of a

Transverse Wave

The crest is
the highest
point on a wave

Parts of a

Transverse Wave

The trough is

the valley

between two
waves, is the
lowest point.

Parts of a Transverse Wave

The wavelength is the horizontal

distance, either between the crests or

troughs of two consecutive waves.

Parts of a Transverse Wave

The amplitude is the peak (greatest) value
(either positive or negative) of a wave. The
distance from the undisturbed level to the trough or crest.

An ocean wave is an example of
a mechanical transverse wave.

Multiple Choice

A wave carries...?

• energy only
• matter only
• energy and matter
• neither

Multiple Choice

Sound travels in which kind of wave?

• Longitudinal waves

• Transverse waves

​The Electromagnetic Spectrum

​Most Electromagnetic waves are classified as Transverse because of the way they travel- particles travel perpendicular to the direction of the wave.

Compressional Wave (longitudinal)

• A mechanical wave in which matter in the medium moves foward and backward along the same direction that the wave travels.

• Ex. Sound waves

A slinky is a good illustration
of how a compressional wave moves.

Multiple Choice

What can electromagnetic waves travel through?

• mediums
• empty space
• solely solids
• both mediums and empty space

Multiple Choice

What kind of wave is pictured below?

• compressional wave
• transverse wave
• sound wave
• mechanical wave

Multiple Choice

Which wave travels parallel in relation to a medium?

• Transverse
• Longitudinal
• Both
• Neither

​Bellwork 10-1 & 2

​1. Have your
answer ready,
but do not write
anything today.
2. Review Wave
Parts- Transverse
and Longitudinal.
You have a quiz!

​Earthquake waves are Mechanical because they need a medium.

​Are P-Waves Transverse or Longitudinal?
Hint: How do they travel?

​Are S-Waves Transverse or Longitudinal?
Hint: How do they travel?

Waves Foldable

​Direction

Cut out the foldable along the dotted lines.
Fold in half (hotdog style)
Add the words from the next slide to the correct section on the foldable and draw a picture for word group.

​Glue Foldable
Page 35

Parts of a Transverse Wave and Longitudinal Wave Quick Quiz

​Transverse Wave Parts
Wave Height
Trough
Wavelength
Rest Position
Crest
Amplitude

On the back of your paper draw a Longitudinal/Compressional Wave and label the parts:
​Transverse Wave Parts
Rarefaction
Compression
Wavelength

​Join the class:
1. Schoology ->
2. Links Folder ->
3. Link to Join PBS
Learning Media
4. Complete the Mechanical Waves Interactive Lesson

​Do not Draw these

​Draw

​Draw

Wavelength determines Frequency

As frequency increases, the wavelength decreases.


As wavelength increases, the frequency decreases.

Inversely related!

Wave
Speed

•WS – wave speed – units
m/s

•F – frequency - units
hertz

•WL – wavelength - units
m, cm

Wave
Speed
Practice

b

a

​Frequency & Pitch and Volume & Amplitude

​The PITCH of a wave is how high or low a note sounds.

High Pitches vibrate quicker (high frequency)
Low Pitches vibrate slower (lower frequency)

The Volume of sound waves is the intensity of the sound.
The lower the amplitude, the quieter the sound.
The higher the amplitude, the louder the sound.

​Frequency determines pitch
Low Frequency = Lower pitch
High Frequency = higher pitch

Amplitude determines volume
Low Amplitude = low volume
High Amplitude = high volume

Bellwork 10-4

Which statement correctly compares the force applied by the student on the box to the force applied by the box on the student?

A When the student applies a 5 N force on the box, the box does not apply a force on the student.
B When the student applies a 10 N force on the box, the box applies a 3 N force on the student.
C When the student applies a 10 N force on the box, the box applies a 10 N force on the student.
D When the student applies a 15 N force on the box, the box applies a 2 N force on the student.

​Draw waves to complete the chart.
Use the information on the right to
help you.

Waves Sorting Activity
-Amplitude
-Wavelength
-Frequency
-Energy

With your pair/group as instructed, sort the cards using the conditions given, record the number of the cards on your answer sheet. Each person will turn in their own answer sheet.

Slinky Waves Demonstration


Following all instructions, you will watch, listen, and complete your demo lab sheet as waves are created with the slinky.

Multiple Choice

Which of the following sound waves represents a dolphin's loud and high pitched whistle. 

• Wave 1
• Wave 2
• Wave 3 

Multiple Choice

Waves carry ________.

• Matter, Energy, and Particles

• matter only

• energy and matter

• energy only

Multiple Choice

When you jump faster on the trampoline, the frequency ________, creating _________ wavelengths.

• increases; shorter

• increases; longer

• decreases; shorter

Multiple Choice

Particles in a solid are arranged very close together and vibrate passing the energy from particle to particle ________.

• fast

• slow

Multiple Choice

What is true of the two waves pictured?

• They have the same wavelength but different frequencies.

• They are both longitudinal waves.

• They have the same frequencies and wavelength

• The top waves is transverse and the bottom wave is longitudinal.

Multiple Choice

How would you describe the movement of the particles of a transverse wave?

• Up and down; perpendicular to the wave energy

• back and forth; perpendicular to the wave energy

• back and forth; parallel to the wave energy

• up and down; parallel to the wave energy

Multiple Choice

What causes a sound to be quiet or loud?

• Wavelength

• frequency

• amplitude

Multiple Choice

What causes a sound to be high pitched?

• high frequency

• low frequency

• high amplitude

• low amplitude

Multiple Choice

The wave pictured would be____.

• loud, low pitched

• loud, high pitched

• quiet, low pitched

• quiet, high pitched

Multiple Choice

What part of the wave is labeled X?

• Frequency
• Amplitude
• Wavelength
• Trough

Multiple Choice

What is a wavelength?

• How many waves pass a certain point

• The distance from one point on a wave to the next identical point on the next consecutive wave

• The entire length of a wave

Multiple Choice

Which wave in the diagram has the greatest wavelength?

• 1
• 2
• 3
• 4

Multiple Choice

The number of waves that pass a certain point in a second is:

• amplitude

• frequency

• wavelength

Multiple Choice

Which vocabulary term is used to identify the distance between points C & G?

• Amplitude
• Crest
• Frequency
• Wavelength

Multiple Choice

Which wave in the diagram has the greatest frequency?

• 1
• 2
• 3
• 4

Multiple Choice

What property of this wave is represented by the letter "A"

• amplitude
• crest
• trough
• wavelength

Multiple Choice

What kind of wave is pictured?

• Transverse
• Longitudinal
• surface
• none of the above

Multiple Choice

What are the parts of a longitudinal wave?

• Compressions and rarefactions
• Crests and troughs
• Compressions and crests
• Rarefactions and troughs

Multiple Choice

In a longitudinal wave, the parts where the coils are close together are called what?

• longitudes
• rarefactions
• compressions
• contractions

Multiple Choice

In longitudinal waves, the parts where the coils are spread apart are called what?

• rarefactions
• compressions
• mechanicals
• longitudes

Multiple Choice

 A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?

• 500 m/s
• 50 m/s
• 5 m/s
• 0.5 m/s

Multiple Choice

 A wave has frequency of 5 Hz and a speed of 25 m/s. What is the wavelength of the wave?

• 25 m
• 125 m
• 5 m
• 25 m/s

Waves Quiz
PS4.1

15 questions.
25 minutes.

​Mastery Connect

Watch It Video

​As the video plays, answer the questions on the front side of your Watch It paper.