PencilGo

Electricity, Magnetism, Light & Sound

Grade 3 · Building confidence · 8 questions · Version PG-1BHNB1J-127M

Free printable
1.Why can you hear an echo?
2.What can happen when light enters water?
3.Why does a shadow form?
4.Name a good electrical conductor.
5.What does a switch control?
6.What do opposite magnetic poles do?
7.What energy change occurs in a speaker?
8.How do you see an object?

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. Why can you hear an echo?Sound reflects from a surface
  2. What can happen when light enters water?It refracts, or bends
  3. Why does a shadow form?An object blocks light
  4. Name a good electrical conductor.Copper
  5. What does a switch control?Whether a circuit is open or closed
  6. What do opposite magnetic poles do?Attract
  7. What energy change occurs in a speaker?Electrical energy becomes sound
  8. How do you see an object?Reflected light enters your eyes

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.