PencilGo

Electricity, Magnetism, Light & Sound

Grade 4 · On-level practice · 8 questions · Version PG-1SA4JVF-IE4M

Free printable
1.What happens to pitch as frequency rises?
2.What affects electromagnet strength?
3.Why are parallel circuit branches useful?
4.Why does a shadow form?
5.What is the electromagnetic spectrum?
6.Why can you hear an echo?
7.What energy change occurs in a speaker?
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 20
  1. What happens to pitch as frequency rises?Pitch becomes higher
  2. What affects electromagnet strength?Current, coil turns, and core material
  3. Why are parallel circuit branches useful?Each branch can operate independently
  4. Why does a shadow form?An object blocks light
  5. What is the electromagnetic spectrum?The full range of electromagnetic waves
  6. Why can you hear an echo?Sound reflects from a surface
  7. What energy change occurs in a speaker?Electrical energy becomes sound
  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.