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Science Lesson Kit · Teacher Resource

Waves: Amplitude, Frequency, Reflection & Absorption — 5E Lesson Plan

Physical Science · 55 minutes

Grade 6

5E lesson flow

  1. 01

    Engage

    7 min

    Teacher Does

    Show an unlabeled repeating wave.

    Students Do

    Notice measurable features.

    Ask

    • What repeats?

    Look For

    Crests, troughs, and a middle position.

  2. 02

    Explore

    14 min

    Teacher Does

    Provide graphs and cycle/time records.

    Students Do

    Measure amplitude and wavelength and calculate frequency.

    Ask

    • Which points define each measurement?

    Look For

    Correct references and units.

  3. 03

    Explain

    10 min

    Teacher Does

    Connect comparable amplitude-energy data.

    Students Do

    Describe the supported pattern.

    Ask

    • What stays comparable?

    Look For

    A bounded data claim.

  4. 04

    Elaborate

    15 min

    Teacher Does

    Facilitate three material-boundary models.

    Students Do

    Model and label reflection, transmission, and absorption.

    Ask

    • Where is energy transferred?

    Look For

    Labeled pathways; no disappearing energy.

  5. 05

    Evaluate

    9 min

    Teacher Does

    Present a flawed model.

    Students Do

    Repair labels, pathways, and a limitation.

    Ask

    • What can this model not show?

    Look For

    A specific limitation.

Student goal

I can use wave data and boundary models to explain wave measurements, energy, and material interactions.

Learning objectives

  • Use a standard repeating-wave representation to measure amplitude and wavelength and calculate frequency from cycles and time.
  • Use data to relate greater amplitude to greater wave energy for comparable waves.
  • Develop and use a material-boundary model to distinguish reflection, absorption, and transmission and state a limitation of the model.

Materials

  • Wave graphs
  • Rope or spring optional
  • Cycle/time data
  • Material-boundary cards
  • Calculators optional

Before class

  • Prepare neutral wave graphs and boundary cards.
  • Keep material applications qualitative.
  • Open Teach Mode.

Prior knowledge

  • Students can read axes and divide whole numbers.
  • Students recognize repeating patterns.

Vocabulary

wave
A repeating disturbance that transfers energy from place to place.
amplitude
The maximum displacement from a wave's rest position.
frequency
The number of cycles that pass a point in a unit of time.
wavelength
The distance between matching points on neighboring wave cycles.
reflection
A wave returning from a boundary.
absorption
A material taking in wave energy.
transmission
A wave passing through a material.

Differentiation

  • Provide marked crest and rest-line supports.
  • Offer cycles ÷ time scaffold.
  • Use selectable arrow alternatives.
  • Extension: compare a second dataset.

Assessment

  • Check amplitude and wavelength measurement.
  • Check two frequency calculations.
  • Check the data claim and boundary model audit.

Exit ticket

Calculate one frequency and state one boundary-model limitation.

Extension

Design a boundary model in which energy is split among multiple pathways.