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Electricity, Magnetism, Light & Sound

Grade 4 · Building confidence · 8 questions · Version PG-HTY79J-O9KU

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

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 13
  1. What do like magnetic poles do?Repel
  2. Why can you hear an echo?Sound reflects from a surface
  3. What energy change occurs in a speaker?Electrical energy becomes sound
  4. What does a switch control?Whether a circuit is open or closed
  5. Name a good electrical conductor.Copper
  6. What do opposite magnetic poles do?Attract
  7. What can happen when light enters water?It refracts, or bends
  8. What happens to pitch as frequency rises?Pitch becomes higher

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.