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Electricity, Magnetism, Light & Sound

Grade 1 · Stretch challenge · 8 questions · Version PG-18YGV49-1TU2

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

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 14
  1. Why does a shadow form?An object blocks light
  2. Name a good electrical conductor.Copper
  3. What do like magnetic poles do?Repel
  4. Why can you hear an echo?Sound reflects from a surface
  5. What does a switch control?Whether a circuit is open or closed
  6. What can happen when light enters water?It refracts, or bends
  7. What energy change occurs in a speaker?Electrical energy becomes sound
  8. What happens to pitch as frequency rises?Pitch becomes higher

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.