"Changes in Sound" Sound PPT Courseware 3

Description

"Changes in Sound" Sound PPT Courseware 3

experiment procedure

1. Extend the steel ruler 10 cm from the table.

2. Hold one end of the steel ruler with one hand and flip the other end of the steel ruler with the other hand.

3. Use different forces (once gently, once hard) to observe the vibration amplitude of the ruler and the changes in the intensity of the sound.

4 Repeat 3 times and observe carefully

The strength of sound is described by volume.

The greater the vibration amplitude, the stronger the sound.

The smaller the vibration amplitude, the weaker the sound.

Observe and compare the changes in the pitch of the voice

1. If these 4 cups are hit with the same force, predict the difference in the sounds they make?

2. Use the sounds of high, higher, lower, and low to describe their changes.

3. Fill in the record form.

rubber band experiment

1. Two students pull one end of the rubber band to make the rubber band tight. One student moves the rubber band, and the other observes how fast the rubber band vibrates.

2. Change the length of the rubber band to relax the rubber band, and use the same force to move the rubber band. Observe how quickly the rubber band vibrates.

3. Repeat the experiment 3 times.

The level of sound is described by pitch

The faster an object vibrates, the higher the sound it makes.

The slower an object vibrates, the lower the sound it makes.

tips

Pitch is high and short, objects are tight, thin, thin

Low pitch, long, loose, thick, rough objects

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Update Time: 2024-11-20

This template belongs to science courseware Fourth Grade Science Volume 1, Textbook Edition industry PPT template

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