PencilGo

Electricity, Magnetism, Light & Sound

Grade 3 · Building confidence · 8 questions · Version PG-1B7NPCK-127M

Free printable
1.What energy change occurs in a speaker?
2.Why does a shadow form?
3.How do you see an object?
4.Why can you hear an echo?
5.What do like magnetic poles do?
6.Name a good electrical conductor.
7.What happens to pitch as frequency rises?
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 13
  1. What energy change occurs in a speaker?Electrical energy becomes sound
  2. Why does a shadow form?An object blocks light
  3. How do you see an object?Reflected light enters your eyes
  4. Why can you hear an echo?Sound reflects from a surface
  5. What do like magnetic poles do?Repel
  6. Name a good electrical conductor.Copper
  7. What happens to pitch as frequency rises?Pitch becomes higher
  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.