"The Propagation of Sound" Sound PPT

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"The Propagation of Sound" Sound PPT

Part 1: Importing new lessons

Do students usually like to play with toys?

Today we are also going to play with toys. We are not only competing to see who can play well, but also competing to see who has gained more knowledge while playing. Today, the teacher brought everyone a tuning fork and a native telephone to continue exploring the mystery of sound.

Propagation of Sound PPT, Part 2: New Lesson Learning

Activity 1 Vibration and sound waves of objects

Strike the tuning fork:

Put a vibrating tuning fork into a water tank. What do you find?

Discussion: How does a vibrating tuning fork cause the water surface to move?

Think about it:

The vibration of an object produces sound, which can also cause the surrounding objects to vibrate, causing the sound to spread around.

Activity 2 Explore sound waves

Local phone number

Please pay attention to solving the following problems while playing:

(1) Did you hear the sound?

(2) How does sound travel from one end of the telephone to the other?

experiment procedure:

Use two paper cups as the microphone or receiver, and a piece of cotton or nylon wire about 5 meters long as the phone cord to make a native telephone.

Straighten the telephone line, one student speaks quietly into the microphone at one end of the line, and the other student answers with the handset at the other end of the line. Then, exchange listening and speaking with each other.

Propagation of sound PPT, part three: conclusion summary

What did you gain from today’s study? Group discussions and exchanges, representatives speaking.

Vibration of an object produces sound, and vibration can cause surrounding objects to vibrate, causing sound to travel from one place to another.

Propagation of Sound PPT, Part 4: Classroom Exercises

1. How does sound travel? ________.

2. Sound propagates in the form of ______. When sound waves encounter objects, they cause ______. This is how sound passes through various materials and ____________.

3. As long as an object vibrates, we can hear sound. Is this view correct?

Propagation of Sound PPT, Part 5: Homework Arrangements

Does sound propagate the same in different objects?

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Update Time: 2024-09-30

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

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