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Electricity, Magnetism, Light & Sound

Grade 5 · On-level practice · 8 questions · Version PG-1AE21BN-PK8Q

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

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 10
  1. What energy change occurs in a speaker?Electrical energy becomes sound
  2. Why does a shadow form?An object blocks light
  3. What affects electromagnet strength?Current, coil turns, and core material
  4. What does a switch control?Whether a circuit is open or closed
  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 can happen when light enters water?It refracts, or bends

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.