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Electricity, Magnetism, Light & Sound

Grade 1 · Stretch challenge · 8 questions · Version PG-1CAC3FX-1TU2

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1.Why does a shadow form?
2.What does a switch control?
3.What energy change occurs in a speaker?
4.What do opposite magnetic poles do?
5.Why can you hear an echo?
6.Name a good electrical conductor.
7.How do you see an object?
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 18
  1. Why does a shadow form?An object blocks light
  2. What does a switch control?Whether a circuit is open or closed
  3. What energy change occurs in a speaker?Electrical energy becomes sound
  4. What do opposite magnetic poles do?Attract
  5. Why can you hear an echo?Sound reflects from a surface
  6. Name a good electrical conductor.Copper
  7. How do you see an object?Reflected light enters your eyes
  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.