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Electricity, Magnetism, Light & Sound

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

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1.What can happen when light enters water?
2.Why does sound travel faster in solids?
3.Why are parallel circuit branches useful?
4.What affects electromagnet strength?
5.What is the electromagnetic spectrum?
6.Why can you hear an echo?
7.Why does a shadow form?
8.What does a switch control?

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 9
  1. What can happen when light enters water?It refracts, or bends
  2. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  3. Why are parallel circuit branches useful?Each branch can operate independently
  4. What affects electromagnet strength?Current, coil turns, and core material
  5. What is the electromagnetic spectrum?The full range of electromagnetic waves
  6. Why can you hear an echo?Sound reflects from a surface
  7. Why does a shadow form?An object blocks light
  8. What does a switch control?Whether a circuit is open or closed

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.