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"Changes of Sound" Sound PPT Download
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 us a snare drum, let us listen to the different sounds made by the snare drum.
Sound changes PPT, part 2 content: new lesson learning
Activity 1 The strength of the sound
Beat the snare drum: What is the difference in the sound of the snare drum when you hit it lightly or hard?
Discussion: What difference did we find about the sound through the experiment just now?
Think about it:
Through the research just now, why do sounds of different strengths and weaknesses appear?
(The intensity of the volume is related to the amplitude of the vibration.)
Activity 2 Vibration amplitude of an object
Dial steel ruler:
Please pay attention to solving the following problems while playing:
(1) Gently move the ruler, what do you find?
(2) Move the ruler hard, what do you find?
Sound changes PPT, part three: conclusion summary
What did you gain from today’s study? Group discussions and exchanges, representatives speaking.
Sounds are strong or weak, and the strength of a sound can be described by volume. The greater the vibration amplitude, the stronger the sound; the smaller the vibration amplitude, the weaker the sound.
Sound Changes PPT, Part 4: Classroom Exercises
1. Sounds are high or low, strong or weak. Can we observe these changes in the sound? _______.
2. The strength of sound can be described by _______.
3. The greater the vibration amplitude, the stronger the sound; the greater the vibration amplitude, the weaker the sound.
Sound changes PPT, Part 5: Homework assignments
Use the knowledge you have learned to design an experiment to describe the relationship between the volume of sound and the vibration of an object.
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