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Electricity, Magnetism, Light & Sound

Grade 5 · Building confidence · 8 questions · Version PG-14UP3YO-P1OG

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1.What energy change occurs in a speaker?
2.What is the electromagnetic spectrum?
3.Why can you hear an echo?
4.What happens to pitch as frequency rises?
5.What does a switch control?
6.Why does sound travel faster in solids?
7.Why does a shadow form?
8.What can happen when light enters water?

Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 11
  1. What energy change occurs in a speaker?Electrical energy becomes sound
  2. What is the electromagnetic spectrum?The full range of electromagnetic waves
  3. Why can you hear an echo?Sound reflects from a surface
  4. What happens to pitch as frequency rises?Pitch becomes higher
  5. What does a switch control?Whether a circuit is open or closed
  6. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  7. Why does a shadow form?An object blocks light
  8. What can happen when light enters water?It refracts, or bends

Worked example

Use a model to track energy, forces, and waves through a system.

Common mistake

Assuming energy travels without a path or medium.

Helpful hint

Draw the source, path, interaction, and result.