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Electricity, Magnetism, Light & Sound

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

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1.What can happen when light enters water?
2.How do you see an object?
3.What do like magnetic poles do?
4.What does a switch control?
5.What happens to pitch as frequency rises?
6.Why does a shadow form?
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 3
  1. What can happen when light enters water?It refracts, or bends
  2. How do you see an object?Reflected light enters your eyes
  3. What do like magnetic poles do?Repel
  4. What does a switch control?Whether a circuit is open or closed
  5. What happens to pitch as frequency rises?Pitch becomes higher
  6. Why does a shadow form?An object blocks light
  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.