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 Page 1


Sound
Page 2


Sound
Overview
• The Facts of Sound
• The Ear and Sound
• Sound Vocabulary
• Musical Instruments and 
Sound
Page 3


Sound
Overview
• The Facts of Sound
• The Ear and Sound
• Sound Vocabulary
• Musical Instruments and 
Sound
The Facts
Sound …
1.  Is a form of energy produced & 
transmitted by vibrating matter
2.  Travels in waves
3.  Travels more quickly through solids than 
liquids or gases
Page 4


Sound
Overview
• The Facts of Sound
• The Ear and Sound
• Sound Vocabulary
• Musical Instruments and 
Sound
The Facts
Sound …
1.  Is a form of energy produced & 
transmitted by vibrating matter
2.  Travels in waves
3.  Travels more quickly through solids than 
liquids or gases
The Ear
• Sound is carried to our ears through 
vibrating air molecules.
• Our ears take in sound waves & turn them 
into signals that go to our brains.
• Sound waves move through 3 parts of the 
ear; outer ear, middle ear, & inner ear.
Middle Ear
Page 5


Sound
Overview
• The Facts of Sound
• The Ear and Sound
• Sound Vocabulary
• Musical Instruments and 
Sound
The Facts
Sound …
1.  Is a form of energy produced & 
transmitted by vibrating matter
2.  Travels in waves
3.  Travels more quickly through solids than 
liquids or gases
The Ear
• Sound is carried to our ears through 
vibrating air molecules.
• Our ears take in sound waves & turn them 
into signals that go to our brains.
• Sound waves move through 3 parts of the 
ear; outer ear, middle ear, & inner ear.
Middle Ear
Vibration
- Back and forth movement of molecules of 
matter
- For example,

FAQs on Chapter 13: Sound - PowerPoint Presentation, Science, Class VIII - Class 8

1. What is sound?

Ans. Sound is a form of energy that travels through matter in the form of waves. These waves are produced by the vibration of an object and are detected by the human ear.

2. How does sound travel?

Ans. Sound waves travel through matter, such as air, solids, and liquids. The sound waves cause the particles in the matter to vibrate, which then produce the sound that we hear.

3. How is sound different from noise?

Ans. Sound is a type of energy that is produced intentionally, while noise is an unwanted or unintentional sound. Sound can be pleasant to the ear, while noise can be annoying or even harmful.

4. How is sound measured?

Ans. Sound is measured in decibels (dB) using a device called a sound level meter. The higher the number of decibels, the louder the sound. Sounds above 85 dB can be harmful to the human ear.

5. What are some everyday examples of sound?

Ans. Some everyday examples of sound include music, speech, traffic noise, and the sound of appliances such as a fan or refrigerator.

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