People's Education Edition Physics for Grade 8, Volume 2
People's Education Edition Ninth Grade Physics Complete Book
People's Education Edition Physics for Grade 8, Volume 1
Shanghai Science Edition Ninth Grade Physics
Shanghai Science Edition 8th Grade Physics
Lu Jiao Edition Ninth Grade Physics Volume 2
Lu Jiao Edition Ninth Grade Physics Volume 1
Beijing Normal University eighth grade physics volume one
Beijing Normal University Ninth Grade Physics Volume 1
Lu Ke Edition High School Physics Compulsory Course One
Guangdong and Shanghai Edition Ninth Grade Physics Volume 1
People's Education Press High School Physics Compulsory Course II
Beijing Normal University Ninth Grade Physics Volume 2
Lu Jiao Edition Eighth Grade Physics Volume 2
Lu Jiao edition eighth grade physics volume 1
Guangdong and Shanghai Edition Ninth Grade Physics Volume 2
Category | Format | Size |
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Lu Jiao edition eighth grade physics volume 1 | pptx | 6 MB |
Description
"The Generation and Propagation of Sound" Sound Phenomenon PPT Courseware 12
Exploration 1: How is sound produced?
Experience sound production
Can you make them sound?
1. Rubber band
2. Ruler
3. Books
What common characteristics do these objects have in common when observing the sounds they make?
Common feature:
1. Paper is vibrating when it makes sound;
2. The ruler is vibrating when it makes sound;
3. The rubber band vibrates when it makes sound.
Shared feelings:
Touch your throat with your hands and speak loudly to experience the feeling of your hands
Your vocal cords vibrate when you speak.
Guess: The sound is caused by the object _______.
Explore: Does the tuning fork vibrate when it sounds?
Conversion method: Convert a phenomenon that is not easily observed into a more obvious phenomenon of another object and express it indirectly.
in conclusion
1. Sound is produced by the vibration of objects.
2. The object that is making sound is called the sound source.
Exploration 2: How does sound spread?
Propagation of sound:
Sound cannot travel through a vacuum;
Air can carry sound;
in conclusion
1. Sound can propagate through all solids, liquids, and gases. The substance through which sound propagates is called a medium.
2. The propagation of sound requires a medium.
3. Sound cannot be transmitted in a vacuum.
Student Activities:
Tap the tabletop twice with the same amount of force, once to listen directly, and once to cover one ear and put the other ear against the tabletop to listen to feel the effects of solid sound transmission and air sound transmission.
Information obtained from the above table:
1. Generally, the speed of sound propagation is fastest in solids, followed by liquids, and the slowest speed in gases.
2. The propagation speed of sound is related to the temperature of the medium;
3. The propagation speed of sound is related to the type of medium;
4. The propagation speed of sound in (15℃) air is 340m/s
Keywords: Acoustic phenomenon teaching courseware, sound generation and propagation teaching courseware, Lujiao version eighth grade physics PPT courseware download, eighth grade physics slide courseware download, acoustic phenomenon PPT courseware download, sound generation and propagation PPT courseware download, .PPT format;
For more information about the "Acoustic Phenomena: The Generation and Spread of Sound" PPT courseware, please click on the "Acoustic Phenomenon ppt: The Generation and Spread of Sound ppt" tag.
"The Generation and Propagation of Sound" Sound Phenomenon PPT Courseware 15:
"Generation and Propagation of Sound" Acoustic Phenomenon PPT Courseware 15 Learning Objectives 1. Through observation and experiment, initially understand the conditions for sound generation 2. Know that sound is produced by the vibration of objects 3. Understand the concept of sound source 4. Through observation and experiment Experiment, preliminary understanding of sound propagation...
"The Generation and Propagation of Sound" Sound Phenomenon PPT Courseware 14:
"Generation and Propagation of Sound" Acoustic Phenomenon PPT Courseware 14 Learning Objectives: Preliminarily understand the conditions for the generation and propagation of sound. Know that sound is produced by the vibration of objects. The propagation of sound requires a medium, and sound propagates at different speeds in different media. I know the echo is...
"The Generation and Propagation of Sound" Sound Phenomenon PPT Courseware 13:
"The Generation and Propagation of Sound" Sound Phenomenon PPT Courseware 13 1. Explore the causes of sound? Activity: Use your existing equipment to make sounds. Think: What characteristics do objects that make sounds have in common? The common characteristics of objects making sounds are: The sound is made of...
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Update Time: 2024-10-20
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