Untitled Quiz

Properties of Waves

• Unit 1 - Lesson 1: Covers the properties of waves, including amplitude, wavelength, frequency, and wave speed.

• 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.

• 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).