"Changes in Sound" Sound PPT Courseware 5

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"Changes in Sound" Sound PPT Courseware 5

Comparative Experiment 1: Observe and compare changes in sound intensity

Requirements: Take a steel ruler or part of a plastic ruler and extend it about 10-12 centimeters from the table. Press one end of the ruler with one hand and dial the other end of the ruler with the other hand.

Group cooperative learning inquiry experiment: (2 minutes)

What is the relationship between the amplitude of vibration and the intensity of the sound?

Each group moves the ruler as a group.

After the dialing is completed, the group leader organizes each group to quickly quiet down.

Ask each group to observe the display effect on the screen again, and the group leader raises his hand to answer the question.

Observe and compare changes in sound intensity

1. Gently move the ruler

2. Move the ruler hard

Observe the intensity of the sound and the amplitude of the vibration

Comparative Experiment 1 - From this we draw the conclusion:

The strength of sound can be described by volume.

The greater the vibration amplitude, the stronger the sound;

The smaller the vibration amplitude, the weaker the sound.

Unit of volume: decibel (dB)

Comparative test three results:

The level of sound can be described by pitch,

Pitch is a quantity that describes how fast an object vibrates.

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

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

Unit of pitch: Hertz (Hz)

Practice all the knowledge in the text

1. Fill in the blanks

1. Sound is produced by ______.

2. The unit of pitch is ______, which describes ____________.

2. Judgment

1. Sounds are high or low, strong or weak. ( )

2. The greater the vibration amplitude, the higher the sound emitted by the object. ( )

3. The slower the vibration, the lower the sound the object makes. ( )

3. Multiple choice questions

1. The unit of volume is ( )

A.Decibel B.Hertz C.Volt

2. When the object stops vibrating, the change of the sound is ( )

A. The sound continues B. Stop immediately C. No change

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"Changes of Sound" Sound PPT:

"Changes in Sound" Sound PPT Part 1: Observe and compare changes in sound intensity. Make part of a steel ruler or plastic ruler extend out of the table about 10 to 12cm. Use one hand to hold one end of the ruler, and the other hand to move the other end of the ruler. First gently move...

"Changes of Sound" Sound PPT Courseware 4:

"Changes of Sound" Sound PPT Courseware 4 Study the relationship between the amplitude and volume of the steel ruler 1. Gently turn the steel ruler, observe and describe the sound made by the steel ruler; 2. Turn the steel ruler hard, observe and describe the sound produced by the steel ruler the sound of. Repeat 3 times and record in the record sheet. ..

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Update Time: 2024-11-23

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

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