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Electricity, Magnetism, Light & Sound

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

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

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 18
  1. What energy change occurs in a speaker?Electrical energy becomes sound
  2. Why does a shadow form?An object blocks light
  3. What happens to pitch as frequency rises?Pitch becomes higher
  4. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  5. What affects electromagnet strength?Current, coil turns, and core material
  6. What can happen when light enters water?It refracts, or bends
  7. What does a switch control?Whether a circuit is open or closed
  8. Why are parallel circuit branches useful?Each branch can operate independently

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.