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Electricity, Magnetism, Light & Sound

Grade 5 · Building confidence · 8 questions · Version PG-CV05QU-P1OG

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1.What does a switch control?
2.Why can you hear an echo?
3.What can happen when light enters water?
4.What energy change occurs in a speaker?
5.What is the electromagnetic spectrum?
6.Why are parallel circuit branches useful?
7.What happens to pitch as frequency rises?
8.What affects electromagnet strength?

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 8
  1. What does a switch control?Whether a circuit is open or closed
  2. Why can you hear an echo?Sound reflects from a surface
  3. What can happen when light enters water?It refracts, or bends
  4. What energy change occurs in a speaker?Electrical energy becomes sound
  5. What is the electromagnetic spectrum?The full range of electromagnetic waves
  6. Why are parallel circuit branches useful?Each branch can operate independently
  7. What happens to pitch as frequency rises?Pitch becomes higher
  8. What affects electromagnet strength?Current, coil turns, and core material

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.