ChalkHour

Year 9 Physics: Waves lesson pack

A complete, ready-to-teach KS3 lesson on waves. Below is a real sample of what ChalkHour makes: the full pack adds three levels of worksheet, model answers, a teaching explainer and print-ready PDF and Word files.

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Real sample

Introduction to Waves: Properties and Calculations

This lesson introduces Year 9 students to the fundamental properties of waves. It covers the two main types of waves (transverse and longitudinal), their physical characteristics, and the mathematical relationship between wave speed, frequency, and wavelength.

Learning objectives

  • Describe the difference between transverse and longitudinal waves.
  • Define the terms amplitude, wavelength, frequency, and period.
  • Identify the parts of a wave including crests, troughs, compressions, and rarefactions.
  • Apply the wave speed equation (v = fλ) to calculate wave properties.

Lesson plan (60 minutes)

  1. Introduction · 5 min

    Do Now: Recall task identifying parts of a wave from a diagram on the board.

  2. Development · 15 min

    Direct Instruction: Teacher explains Transverse vs Longitudinal waves using a Slinky demo and the Explainer Script.

  3. Development · 10 min

    Guided Practice: Working through the wave speed equation example on the board.

  4. Main Task · 20 min

    Independent Practice: Students complete differentiated worksheets (Support, Core, or Stretch).

  5. Plenary · 5 min

    Assessment: 8-question multiple-choice quiz.

  6. Plenary · 5 min

    Feedback: Peer marking of the quiz and pack away.

Key vocabulary

Amplitude
The maximum displacement of a point on a wave away from its undisturbed (rest) position.
Wavelength
The distance from a point on one wave to the equivalent point on the next wave.
Frequency
The number of complete waves passing a certain point each second.
Hertz (Hz)
The unit of frequency, equal to one cycle per second.
Period
The time it takes for one full cycle of the wave to pass a point.

Core worksheet (first questions)

  1. Explain the difference between transverse and longitudinal waves.
  2. Define the term 'frequency'.
  3. What is the unit for frequency?
  4. State the wave speed equation.

Quiz (sample)

  1. 1. In which type of wave are the oscillations perpendicular to the direction of energy transfer?

    • A. Transverse
    • B. Longitudinal
    • C. Mechanical
    • D. Seismic P-waves

  2. 2. What is the unit of measurement for frequency?

    • A. Joules (J)
    • B. Hertz (Hz)
    • C. Newtons (N)
    • D. Metres (m)

  3. 3. Which of these best defines 'amplitude'?

    • A. The distance from peak to peak.
    • B. The number of waves per second.
    • C. The maximum displacement from the undisturbed position.
    • D. The time taken for one wave to pass.

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Support and Stretch worksheets, every answer and model answer, the teaching explainer and common misconceptions, editable and ready to print as PDF or Word.

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