"The Propagation of Sound" Sound PPT Courseware 2

Description

"The Propagation of Sound" Sound PPT Courseware 2

teaching objectives:

1. Know that sound can propagate in solids, liquids, and gases, but cannot propagate in vacuum, that is, the propagation of sound requires a medium.

2. Know that different objects propagate sound at different speeds.

3. Through the study of this lesson, students’ curiosity about nature will be stimulated.

Important and difficult points in teaching:

1. Key points: Know that the propagation of sound requires a medium.

2. Difficulty: Know that different objects propagate different sounds

1. The pre-cognitive foundation that students already have: Students already know that the physical phenomenon of sound exists in life, but they do not understand it very well.

2. The foundation of prerequisite skills that students already have: Because students have just started learning physics knowledge, their ability to observe, explore and analyze physical phenomena is very weak, and they have almost no prerequisite skills at all. Therefore, when teaching We should pay attention to the guidance in these aspects.

3. Students’ thinking barriers: Students who have just started learning physics have difficulty understanding some abstract physical concepts, such as vacuum, sound waves and sound speed. These concepts pose certain obstacles to their thinking, so when explaining these concepts, special attention should be paid to the guidance method.

1. Ask questions about how you heard the teacher’s voice through roll call.

2. Guess what sound is transmitted through, assuming that sound is transmitted through gas, solid, or liquid.

3. Experiment:

A: Native phone voice

B: How about lightly touching the water with a hard-struck tuning fork?

C: Two people tell each other the good qualities of each other. Spread

D: Listen to the propagation effect of sound on aluminum foil ruler, meter ruler, cotton thread, and nylon thread.

4. Use the previously learned "sound is produced by the vibration of objects" and experimental explanations that sound can propagate through gases, liquids, and solids. Let students explore whether the design and plan of the experiment have flaws, whether they need improvement, and if so, how to improve it.

5. Through experiments, summarize how sound propagates and the effect of sound propagation in different objects.

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For more information about "The Propagation of Sound" PPT courseware, please click on the "Sound ppt Propagation of Sound ppt" tag.

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Update Time: 2024-11-18

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

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