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Electricity, Magnetism, Light & Sound

Grade 1 · Stretch challenge · 8 questions · Version PG-19IG2I7-1TU2

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

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 12
  1. What happens to pitch as frequency rises?Pitch becomes higher
  2. What does a switch control?Whether a circuit is open or closed
  3. What do opposite magnetic poles do?Attract
  4. Why does a shadow form?An object blocks light
  5. How do you see an object?Reflected light enters your eyes
  6. Name a good electrical conductor.Copper
  7. What energy change occurs in a speaker?Electrical energy becomes sound
  8. Why can you hear an echo?Sound reflects from a surface

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.