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Electricity, Magnetism, Light & Sound

Grade 1 · Stretch challenge · 8 questions · Version PG-184I21C-1TU2

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

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

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.