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Electricity, Magnetism, Light & Sound

Grade 4 · On-level practice · 8 questions · Version PG-OVFIVG-IE4M

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

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 14
  1. What happens to pitch as frequency rises?Pitch becomes higher
  2. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  3. Why does a shadow form?An object blocks light
  4. What is the electromagnetic spectrum?The full range of electromagnetic waves
  5. Why can you hear an echo?Sound reflects from a surface
  6. What energy change occurs in a speaker?Electrical energy becomes sound
  7. What can happen when light enters water?It refracts, or bends
  8. What does a switch control?Whether a circuit is open or closed

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.