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Electricity, Magnetism, Light & Sound

Grade 4 · Building confidence · 8 questions · Version PG-K18ZSM-O9KU

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

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 9
  1. What do like magnetic poles do?Repel
  2. What happens to pitch as frequency rises?Pitch becomes higher
  3. Why can you hear an echo?Sound reflects from a surface
  4. Why does a shadow form?An object blocks light
  5. What do opposite magnetic poles do?Attract
  6. Name a good electrical conductor.Copper
  7. What energy change occurs in a speaker?Electrical energy becomes sound
  8. What can happen when light enters water?It refracts, or bends

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.