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Electricity, Magnetism, Light & Sound

Grade 5 · Stretch challenge · 8 questions · Version PG-145ENEM-O17E

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1.What happens to pitch as frequency rises?
2.What does a switch control?
3.Why does sound travel faster in solids?
4.What can happen when light enters water?
5.What affects electromagnet strength?
6.Why does a shadow form?
7.Why are parallel circuit branches useful?
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 2
  1. What happens to pitch as frequency rises?Pitch becomes higher
  2. What does a switch control?Whether a circuit is open or closed
  3. Why does sound travel faster in solids?Close particles transfer vibrations quickly
  4. What can happen when light enters water?It refracts, or bends
  5. What affects electromagnet strength?Current, coil turns, and core material
  6. Why does a shadow form?An object blocks light
  7. Why are parallel circuit branches useful?Each branch can operate independently
  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.