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Electricity, Magnetism, Light & Sound

Grade 5 · Stretch challenge · 8 questions · Version PG-14EZH23-O17E

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1.What can happen when light enters water?
2.What is the electromagnetic spectrum?
3.What affects electromagnet strength?
4.What energy change occurs in a speaker?
5.What happens to pitch as frequency rises?
6.Why can you hear an echo?
7.What does a switch control?
8.Why are parallel circuit branches useful?

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 12
  1. What can happen when light enters water?It refracts, or bends
  2. What is the electromagnetic spectrum?The full range of electromagnetic waves
  3. What affects electromagnet strength?Current, coil turns, and core material
  4. What energy change occurs in a speaker?Electrical energy becomes sound
  5. What happens to pitch as frequency rises?Pitch becomes higher
  6. Why can you hear an echo?Sound reflects from a surface
  7. What does a switch control?Whether a circuit is open or closed
  8. Why are parallel circuit branches useful?Each branch can operate independently

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.