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Electricity, Magnetism, Light & Sound

Grade 2 · On-level practice · 8 questions · Version PG-PZZ1QA-KW5O

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