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Electricity, Magnetism, Light & Sound

Grade 2 · Stretch challenge · 8 questions · Version PG-1FCGM4Q-1YNK

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

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. What can happen when light enters water?It refracts, or bends
  2. What happens to pitch as frequency rises?Pitch becomes higher
  3. What do like magnetic poles do?Repel
  4. What do opposite magnetic poles do?Attract
  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 energy change occurs in a speaker?Electrical energy becomes sound

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.