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Waves
DO NOW MONDAY Tell the type of heat
transfer happening at each letter.
A
B
C
DO NOW TUESDAY
Give your own definition of a wave.
Learning Targets 1.1a Define mechanical wave.
1.2a Define electromagnetic wave.
1.3a Identify an electromagnetic wave.
1.4a Identify a mechanical wave.
1.5a Differentiate between mechanical and electromagnetic waves.
Etch-A-Sketch Use pages 14-17 in the textbook to
complete the handout.
Write the big ideas/important details on the right and then draw a picture to help you understand the word on the left.
If you work alone quietly and very hard for the first 20 minutes, then you may work with the person at the table with you for the last 20 minutes, provided that you get your work completed TODAY.
Any work not completed today is HOMEWORK.
DO NOW WEDNESDAY
Answer the two questions on the sheet given to you.
1 2
Learning Targets 1.1a Define mechanical wave.
1.2a Define electromagnetic wave.
1.3a Identify an electromagnetic wave.
1.4a Identify a mechanical wave.
1.5a Differentiate between mechanical and electromagnetic waves.
What’s a wave?
Wave: a rhythmic disturbance that transfers energy through matter or space
Two general types of waves: Mechanical waves
Electromagnetic waves
Mechanical Waves Require matter to travel through
The matter the mechanical wave travels through is called a MEDIUM
Examples of a medium that a mechanical wave can travel through: sound waves, earthquake waves, water waves
Can be transverse or longitudinal
Longitudinal Wave
Transverse Wave
Mechanical Waves
Two types of mechanical waves:
1. Transverse : matter moves in the medium at right angles to the direction that the wave is travelling Examples: water waves, S-type earthquake
waves
2. Longitudinal: vibration is parallel to the direction of motion of the wave; back and forth motion; also called compressional waves Examples: sound waves, P-type earthquake
waves
Transverse Waves
Crest: highest point of a transverse wave
Trough: lowest point of a transverse wave
Amplitude: the amount of energy carried by a wave; corresponds to the height of a transverse wave
Wavelength: the distance between two identical points on a wave
Longitudinal/Compressional Waves
Rarefaction: expanded portion of the wave; particles are spread apart
Compression: compressed (squeezed) portion of the wave; particles are pushed together
Wavelength: the distance between two identical points on a wave
Amplitude: the amount of energy carried by a wave; corresponds to the amount of compression in a longitudinal wave
DO NOW FRIDAY
Answer the two analyzing data multiple choice questions on the sheet that was given to you.
DO NOW MONDAY Identify the parts of the
transverse wave labeled with letters below.
A
B C
D
Learning Targets
1.2b Identify the different parts of a wave.
1.3b Explain the strength of the wave by analyzing amplitude and wavelength.
1.4b Explain the relationship between the frequency and the type of wave.
Amplitude- amount of energy carried by a wave
Low Amplitude
Medium Amplitude
High Amplitude
Wavelength- distance between two identical
points on a wave
Short Wavelength
Long Wavelength
Frequency- the number of waves that pass a given point in 1
second
Low Frequency High Frequency
Relationship between amplitude, wavelength, frequency, and
energy
HIGH AMPLITUDE = HIGH ENERGY
LOW AMPLITUDE = LOW ENERGY
LONG WAVELENGTH = LOW FREQUENCY = LOW ENERGY
SHORT WAVELENGTH = HIGH FREQUENCY = HIGH ENERGY
DO NOW TUESDAYUse the following terms to answer the numbers below.
Medium Transverse Longitudinal EnergyCompression Rarefaction
1. Waves transfer this.2. Waves in which the matter moves at right angles to the direction of the wave .3. The matter a moves through.4. Waves in which the matter moves parallel to the direction of the wave.5. Expanded portion of a longitudinal wave.6. Squeezed together portion of a longitudinal wave.
Quiz Expectations
1. QUIET
2. Do your best. (Eyes on own paper.)
3. Finished? (Turn your scantron over and write a note or draw a picture for Mrs. Dyer on the back.)
Learning Targets
1.3b Explain the strength of the wave by analyzing amplitude and wavelength.
1.4b Explain the relationship between the frequency and the type of wave.
Wave Equation The speed of a wave is equal to its
frequency times its wavelength.
The equation is: Speed = frequency x wavelength
Use the triangle below to solve for the speed, frequency, or wavelength of a wave.
v
λ f
Wave EquationExample:
A tuning fork has a frequency of 310 Hz. The wavelength of the sound produced by the tuning fork is 1.32 m. Calculate the speed of the wave.
SOLUTION:
Given: Formula to solve for missing part:
= Setup/Solution:
f =
v =
Wave Equation
Guided Practice
What is the speed of a wave with a frequency of 760 Hz and a wavelength of .45 m?
Given: Formula:
Setup/Solution:
Wave Equation
Guided Practice
What is the frequency of a wave that is moving at 30 m/s with a wavelength of .35 m?
Given: Formula:
Setup/Solution:
Wave Equation
Guided Practice What is the wavelength of a wave moving at 340 m/s
with a frequency of 256 Hz?
Given: Formula:
Setup/Solution:
DO NOW WEDNESDAY
Answer the two multiple choice questions on the paper given to you.
Learning Targets
1.5a Differentiate between mechanical and electromagnetic waves.
Electromagnetic Spectrum You will work with your group to create a
poster/visual of the electromagnetic spectrum.
Be sure to follow the scoring guide given to you. You will only have today to work on this.
DO NOW THURSDAY
Calculate the frequency of a wave that is moving at 35 m/s with a wavelength of .45 m.
v
λ f
Learning Targets
1.2b Identify the different parts of a wave.
1.3b Explain the strength of the wave by analyzing amplitude and wavelength.
1.4b Explain the relationship between the frequency and the type of wave.
1.5b Compare and contrast a transverse and a longitudinal wave.
DO NOW FRIDAY
Answer the two multiple choice questions on the paper given to you.
Learning Targets
1.5a Differentiate between mechanical and electromagnetic waves.
1.3b Explain the strength of the wave by analyzing amplitude and wavelength.
1.4b Explain the relationship between the frequency and the type of wave.
Electromagnetic Waves Do not require a medium through which to
travel (means they can travel through a vacuum such as space)
Examples: radio waves, microwaves, infrared waves (heat), light waves, UV rays, X-rays, gamma rays
Are transverse waves
All electromagnetic waves travel at the same speed.
Their speed is the speed of light = 300,000,000 m/s
That’s 186,000 miles/second!!!!!!
EXIT SLIP WEDNESDAY Complete the T chart that you were given to differentiate between mechanical and electromagnetic waves.
Mechanical Waves Electromagnetic Waves
Learning Targets 1.1a Define mechanical wave.
1.2a Define electromagnetic wave.
1.3a Identify an electromagnetic wave.
1.4a Identify a mechanical wave.
1.5a Differentiate between mechanical and electromagnetic waves.
DO NOW THURSDAY Each table will be assigned a word from the
Etch-A-Sketch Sheet.
You will write the word, the definition/important details about the word on the right side of your page and Sketch a good picture to help you remember it on the left side of the page. You will have 3 minutes to do this.
You will post your page on the wall.
Everyone in the class will do a gallery walk around the room and complete their Etch-A-Sketch WS, then turn in. You will have 7 minutes to do this.
Instructions for THURSDAY If you made Mastery on your Exam, you will do
an enrichment activity on the ChromeBooks, If you would like to redo questions that you missed on the exam, you may do so for half credit.
If you made Progressing, you will be given a redo sheet with the questions you missed and your incorrect answer. You will choose a new answer and explain why it is the correct answer. You may use your notes for this. You will receive half credit for every question you get correct.
If you made Needs Improvement, you will receive additional instruction from me and will redo the questions you missed on the exam.
