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Electricity, Magnetism, Light & Sound

Grade 4 · Building confidence · 8 questions · Version PG-NN3TT9-O9KU

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