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Electricity, Magnetism, Light & Sound

Grade 2 · Stretch challenge · 8 questions · Version PG-1DYILNV-1YNK

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1.What does a switch control?
2.What do opposite magnetic poles do?
3.How do you see an object?
4.What do like magnetic poles do?
5.Why does a shadow form?
6.Why can you hear an echo?
7.Name a good electrical conductor.
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 13
  1. What does a switch control?Whether a circuit is open or closed
  2. What do opposite magnetic poles do?Attract
  3. How do you see an object?Reflected light enters your eyes
  4. What do like magnetic poles do?Repel
  5. Why does a shadow form?An object blocks light
  6. Why can you hear an echo?Sound reflects from a surface
  7. Name a good electrical conductor.Copper
  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.