Listen Up

LEARNING OUTCOME

Sound moves in straight lines. It is made from vibrations.

Sound travels as waves which change with the volume and pitch.

Sound waves become amplified inside a bell.

SESSION activities

• Feel sound vibrations with tuning forks
• Construct a device to prove that sound moves through the air
• See that sound moves and the waves vibrate a surface
• Discover Lissajous patterns
• Understand volume and pitch

SCIENCE EDUCATOR demonstrations

• Demonstrate that sound travels and is invisible
• Sound moves through the air
• Visualize the sound waves
• Demonstrate that sound moves through many medium
• Demonstrate how pitch changes with length

STUDENT experiments

• Feel vibrations
• Construct a sand drum
• Note that the surface of the drum moves when loud noises are created
• Construct an amplifier and discover how it works