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Electricity, Magnetism, Light & Sound

Grade 5 · Building confidence · 8 questions · Version PG-16IMQ4I-P1OG

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1.Why are parallel circuit branches useful?
2.Why does sound travel faster in solids?
3.What does a switch control?
4.What energy change occurs in a speaker?
5.Why does a shadow form?
6.What affects electromagnet strength?
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 17
  1. Why are parallel circuit branches useful?Each branch can operate independently
  2. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  3. What does a switch control?Whether a circuit is open or closed
  4. What energy change occurs in a speaker?Electrical energy becomes sound
  5. Why does a shadow form?An object blocks light
  6. What affects electromagnet strength?Current, coil turns, and core material
  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.