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Electricity, Magnetism, Light & Sound

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

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1.Why can you hear an echo?
2.Why does a shadow form?
3.What energy change occurs in a speaker?
4.Why does sound travel faster in solids?
5.What does a switch control?
6.What affects electromagnet strength?
7.What is the electromagnetic spectrum?
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 5
  1. Why can you hear an echo?Sound reflects from a surface
  2. Why does a shadow form?An object blocks light
  3. What energy change occurs in a speaker?Electrical energy becomes sound
  4. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  5. What does a switch control?Whether a circuit is open or closed
  6. What affects electromagnet strength?Current, coil turns, and core material
  7. What is the electromagnetic spectrum?The full range of electromagnetic waves
  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.