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Electricity, Magnetism, Light & Sound

Grade 5 · Building confidence · 8 questions · Version PG-G6VE2I-P1OG

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1.Why can you hear an echo?
2.What does a switch control?
3.What is the electromagnetic spectrum?
4.What affects electromagnet strength?
5.Why does sound travel faster in solids?
6.What happens to pitch as frequency rises?
7.Why are parallel circuit branches useful?
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 4
  1. Why can you hear an echo?Sound reflects from a surface
  2. What does a switch control?Whether a circuit is open or closed
  3. What is the electromagnetic spectrum?The full range of electromagnetic waves
  4. What affects electromagnet strength?Current, coil turns, and core material
  5. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  6. What happens to pitch as frequency rises?Pitch becomes higher
  7. Why are parallel circuit branches useful?Each branch can operate independently
  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.