APSB - 8 - Science :: Sound

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Go To: APSB-Science-Grade 8

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[Author - Anu Nived]


Objective: To teach the students about sound and how sound is produced

Subtopics to be covered:

- How sound travel through different mediums

- How do we hear and characteristic of sound

- Sound pollution, effects and prevention of sound pollution

Learning Outcome:

- Students know about sound and difference between music and noise

- They know about the sound frequencies

- They know how do we hear and are aware of sound pollution


[Author - Kripa S]


https://www.youtube.com/watch?v=CzG0ioYIIFs (Sound needs a medium - English)


[Author - Kripa S]


1. https://www.youtube.com/watch?v=BoSh_ei7KoI (straw flute)

2. Make a list of sounds you hear in your surroundings.

3. Take a rubber band. Put it around the longer side of a pencil box. Insert two pencils between the box and the stretched rubber. Now, pluck the rubber band somewhere in the middle. Do you hear any sound? Does the band vibrate?

3. Take a metal dish. Pour water in it. Strike it at its edge by a spoon. Do you hear a sound? Again strike the plate and then touch it. Can you feel the dish vibrating? Strike the dish again. Look at the surface of water. Do you see any waves there? Now hold the dish. What change do you observe on the surface of water? Can you explain the change? Is there a hint to connect sound with the vibrations of a body?

4. https://www.youtube.com/watch?v=ntLS1T7cO44 (roaring bottle)


Term' Transliterated Term Translated Term
Vibrate                                               వైబ్రేట్                                   ప్రకంపన 
Vaccum                                              వక్క్యూమ్                                           
Intensity                                           ఇంటెన్సిటీ                                  తీవ్రత 
Amplitude                                        ఆమ్ప్లిట్యూడ్                              వ్యాప్తి 
Bitch                                                     పిచ్                                               
Frequency                                         ఫ్రీక్వెన్సీ                            పౌన పున్యం 
Feeble                                                 ఫెబ్ల్                                    బలహీనమైన 
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