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Electricity, Magnetism, Light & Sound

Grade 5 · Stretch challenge · 8 questions · Version PG-14ZDGHJ-O17E

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1.What can happen when light enters water?
2.What affects electromagnet strength?
3.What is the electromagnetic spectrum?
4.Why does sound travel faster in solids?
5.Why does a shadow form?
6.Why can you hear an echo?
7.What happens to pitch as frequency rises?
8.What energy change occurs in a speaker?

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. What can happen when light enters water?It refracts, or bends
  2. What affects electromagnet strength?Current, coil turns, and core material
  3. What is the electromagnetic spectrum?The full range of electromagnetic waves
  4. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  5. Why does a shadow form?An object blocks light
  6. Why can you hear an echo?Sound reflects from a surface
  7. What happens to pitch as frequency rises?Pitch becomes higher
  8. What energy change occurs in a speaker?Electrical energy becomes sound

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.