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Electricity, Magnetism, Light & Sound

Grade 4 · Building confidence · 8 questions · Version PG-ND484A-O9KU

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1.What does a switch control?
2.Name a good electrical conductor.
3.What energy change occurs in a speaker?
4.Why can you hear an echo?
5.What do like magnetic poles do?
6.What happens to pitch as frequency rises?
7.What can happen when light enters water?
8.Why does a shadow form?

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 5
  1. What does a switch control?Whether a circuit is open or closed
  2. Name a good electrical conductor.Copper
  3. What energy change occurs in a speaker?Electrical energy becomes sound
  4. Why can you hear an echo?Sound reflects from a surface
  5. What do like magnetic poles do?Repel
  6. What happens to pitch as frequency rises?Pitch becomes higher
  7. What can happen when light enters water?It refracts, or bends
  8. Why does a shadow form?An object blocks light

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.