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Electricity, Magnetism, Light & Sound

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

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1.How do you see an object?
2.What happens to pitch as frequency rises?
3.What energy change occurs in a speaker?
4.What do like magnetic poles do?
5.Why can you hear an echo?
6.Name a good electrical conductor.
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 17
  1. How do you see an object?Reflected light enters your eyes
  2. What happens to pitch as frequency rises?Pitch becomes higher
  3. What energy change occurs in a speaker?Electrical energy becomes sound
  4. What do like magnetic poles do?Repel
  5. Why can you hear an echo?Sound reflects from a surface
  6. Name a good electrical conductor.Copper
  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.