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Electricity, Magnetism, Light & Sound

Grade 2 · On-level practice · 8 questions · Version PG-RDX275-KW5O

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1.How do you see an object?
2.What can happen when light enters water?
3.Name a good electrical conductor.
4.What does a switch control?
5.What energy change occurs in a speaker?
6.What happens to pitch as frequency rises?
7.Why does a shadow form?
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 19
  1. How do you see an object?Reflected light enters your eyes
  2. What can happen when light enters water?It refracts, or bends
  3. Name a good electrical conductor.Copper
  4. What does a switch control?Whether a circuit is open or closed
  5. What energy change occurs in a speaker?Electrical energy becomes sound
  6. What happens to pitch as frequency rises?Pitch becomes higher
  7. Why does a shadow form?An object blocks light
  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.