Podcast
Questions and Answers
What is wavelength primarily defined as?
What is wavelength primarily defined as?
How is amplitude related to energy in a wave?
How is amplitude related to energy in a wave?
Which statement about frequency is correct?
Which statement about frequency is correct?
What does the amplitude of a wave represent?
What does the amplitude of a wave represent?
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Which of the following best explains wave speed?
Which of the following best explains wave speed?
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What is the unit of frequency?
What is the unit of frequency?
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Which formula correctly represents wave speed?
Which formula correctly represents wave speed?
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If a wave has a frequency of 6 Hz and a wavelength of 3 m, what is its wave speed?
If a wave has a frequency of 6 Hz and a wavelength of 3 m, what is its wave speed?
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What happens to wave speed if the frequency is decreased while the wavelength remains constant?
What happens to wave speed if the frequency is decreased while the wavelength remains constant?
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Which of the following statements about amplitude is correct?
Which of the following statements about amplitude is correct?
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Which scenario correctly explains the relationship between frequency and wavelength?
Which scenario correctly explains the relationship between frequency and wavelength?
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What does a frequency of 1 Hz indicate?
What does a frequency of 1 Hz indicate?
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If the wavelength of a wave is doubled and the frequency remains constant, how does the wave speed change?
If the wavelength of a wave is doubled and the frequency remains constant, how does the wave speed change?
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In what unit is wave speed expressed?
In what unit is wave speed expressed?
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How does amplitude relate to wave energy?
How does amplitude relate to wave energy?
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Study Notes
Properties of Waves
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Unit 1 - Lesson 1: Covers the properties of waves, including amplitude, wavelength, frequency, and wave speed.
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Standards:
- MS-PS4-1: Describes a simple wave model, focusing on how wave amplitude relates to energy.
- MS-PS4-2: Develops and uses a model to explain how waves are reflected, absorbed, or transmitted through various materials.
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Objectives:
- Identify wave properties.
- Understand the meaning of amplitude.
- Define wavelength.
- Define frequency.
- Explain the relationship between wave energy and amplitude.
- Predict wave speed from a graph showing frequency and wavelength.
Vocabulary
- Amplitude
- Wavelength
- Frequency
- Wave speed
Starter Activity
- Write two types of waves from your textbook.
Properties of Wave - Activity with Slinky
- Use a slinky to see how high the wave moves (Amplitude).
- Determine how many waves can be made in a set time (Frequency).
- Measure distance between wave crests (Wavelength).
- Define each word in your own terms along with wave speed.
Think-Pair-Share
- Identify which pictures represent high-energy waves.
- Explain your reasoning for high-energy wave selection.
Energy and Amplitude in a Wave
- Wave amplitude is dependent on energy.
- Wave energy is proportional to the square of the amplitude.
- A wave with a larger amplitude carries more energy.
Check Your Understanding
- Identify which wave has high and low amplitude in provided images, explaining your answer.
Properties of Wave (Amplitude, Wavelength, Frequency, Wave Speed)
- Amplitude: Measure of how far a particle in the medium moves from its normal position. Amplitude is half the difference between a crest and a trough.
- Wavelength: Distance from any point on a wave to an identical point on the next wave (crest to crest, or trough to trough). Wavelength measures the length of one cycle of a wave.
- Frequency: Number of waves produced in a set amount of time. Measured in hertz (Hz). One hertz equals one wave per second (1 Hz = 1/s).
- Wave Speed (v): Rate at which a wave travels. Calculated by multiplying wavelength and frequency (v = fλ).
Properties of Wave (Frequency and Wave Speed)
- Frequency is measured in hertz (Hz). One hertz equals one wave per second (1 Hz = 1/s).
- Wave speed is the rate at which a wave travels. Wave speed can be calculated by multiplying wavelength and frequency (v = fλ).
Speed of Waves
- Wave speed = frequency x wavelength
- Symbols and units: v = fλ, where v = m/s, f = Hz, λ = m
Wave Speed Formula Triangle
- A triangle visually displays the relationship between wave speed, frequency and wavelength; making it clear how to calculate for missing values.
Check Your Understanding: Group Work
- Group 1: Define frequency, wavelength, amplitude, and wave speed.
- Group 2: Describe the relationship between frequency and wavelength.
- Group 3: Explain the relationship between amplitude and energy.
- Group 4: Write the formula for calculating wave speed, including units for speed, wavelength, and frequency.
Engineer It - Challenge Question
- An engineer at a water park recommended reducing the frequency of the wave generator to decrease wave speed, maintaining the safety of park guests.
Day 2 Objectives
- Write the formula for wave speed.
- Calculate wave speed.
- Derive a formula to calculate wavelength or frequency from the speed formula.
Starter Activity (Day 2)
- Write the formula for wave speed.
Previous Knowledge
- Wave speed = frequency x wavelength. (v = fλ)
- Speed (m/s) = Frequency (Hz) x Wavelength (m)
I Do: Wave Speed Calculations
- Example calculations that show how to determine wave speed given frequency and wavelength, or vice-versa.
We Do: Wave Speed Calculations
- Example calculations (following a logical sequence) to Determine wave speed (given a frequency and a wavelength).
You Do: Wave Speed Calculations
- Student determines wave frequency given wave speed and wavelength.
Extra Activity – Quizizz
- Link to a Quizizz quiz on wave speed calculations.
Jeopardy
- Link to a Jeopardy game on wave types.
Day 3 – Diagnostic Test
- Diagnostic quiz on wave topics.
Day 4 Objectives
- Types of mechanical waves
- How waves transfer energy
- Difference between longitudinal and transverse waves (comparisons should be made).
Starter
- Identify differences between two given wave images.
Numbered Heads Together (Book Exercises)
- Instruction set for student group work on exercises from the physical science textbook (pages 7, 11, 12, 20-21).
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