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Electricity, Magnetism, Light & Sound

Grade 5 · On-level practice · 8 questions · Version PG-1CBZ96G-PK8Q

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

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. Why does a shadow form?An object blocks light
  2. What energy change occurs in a speaker?Electrical energy becomes sound
  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. Why can you hear an echo?Sound reflects from a surface
  6. What can happen when light enters water?It refracts, or bends
  7. What happens to pitch as frequency rises?Pitch becomes higher
  8. What is the electromagnetic spectrum?The full range of electromagnetic waves

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.