PencilGo

Electricity, Magnetism, Light & Sound

Grade 3 · Building confidence · 8 questions · Version PG-19JQ36Q-127M

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

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 19
  1. What can happen when light enters water?It refracts, or bends
  2. Why can you hear an echo?Sound reflects from a surface
  3. What does a switch control?Whether a circuit is open or closed
  4. How do you see an object?Reflected light enters your eyes
  5. What happens to pitch as frequency rises?Pitch becomes higher
  6. Why does a shadow form?An object blocks light
  7. What energy change occurs in a speaker?Electrical energy becomes sound
  8. What do opposite magnetic poles do?Attract

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.