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Electricity, Magnetism, Light & Sound

Grade 5 · Stretch challenge · 8 questions · Version PG-13VF1PN-O17E

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1.What is the electromagnetic spectrum?
2.Why does a shadow form?
3.Why does sound travel faster in solids?
4.What happens to pitch as frequency rises?
5.Why can you hear an echo?
6.What can happen when light enters water?
7.Why are parallel circuit branches useful?
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 1
  1. What is the electromagnetic spectrum?The full range of electromagnetic waves
  2. Why does a shadow form?An object blocks light
  3. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  4. What happens to pitch as frequency rises?Pitch becomes higher
  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. Why are parallel circuit branches useful?Each branch can operate independently
  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.