Compare the shape and motion of waves

Make a prediction and investigate

Sketch the initial wave and label a crest and trough. Change one available control and compare the new pattern.

Controls in the actual lab

• Frequency: starts at 0.8 Hz; available range 0.4–2.4 Hz.
• Height: starts at 16 ; available range 8–28 .

Frequency is how often the pulse comes. Higher frequency, shorter distance between crests. Amplitude is height — it does not set the spacing.

Discuss the evidence

Distinguish the height of a wave from the spacing between crests. Point to evidence on the display.

Try it beyond the activity

Explain why a taller wave and a wave with closer crests describe different observations.

Record your thinking

Sources and limits

This companion uses the published Waves activity and its learning guidance. Review any original sources linked there. It is a discussion plan by Lesson Worlds, not a scored assessment, a standards certification, or evidence of learning gains.

Use this activity with a learner

Families and educators · choose by prior knowledge

Learning goal: Frequency is how often the pulse comes. Higher frequency, shorter distance between crests. Amplitude is height — it does not set the spacing.

Before you begin: Read the controls for Frequency, Height. Make one prediction before changing a setting.

Check understanding: Ask for one observation, the evidence that supports it, and a question to investigate next.

A simulation simplifies the real world. Explain which conditions stayed fixed; a successful run alone does not demonstrate mastery.

Activity and guide by Lesson Worlds. About the platform.