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Electricity, Magnetism, Light & Sound

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

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

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 7
  1. Why can you hear an echo?Sound reflects from a surface
  2. What can happen when light enters water?It refracts, or bends
  3. What energy change occurs in a speaker?Electrical energy becomes sound
  4. What happens to pitch as frequency rises?Pitch becomes higher
  5. Name a good electrical conductor.Copper
  6. How do you see an object?Reflected light enters your eyes
  7. What do like magnetic poles do?Repel
  8. What do opposite magnetic poles do?Attract

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.