APSB - 8 - Science :: Sound
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]
http://scert.telangana.gov.in/sites/default/files/publication/ebooks/8TM_PHY.pdf#page=75 (Telangana Board) (Telugu Medium)
https://drive.google.com/folderview?id=0B0WiysvR2DOlVDVZYnlsNzlVVk0&usp=sharing (AP Board) (Telugu Medium)
http://scert.telangana.gov.in/sites/default/files/publication/ebooks/8EM_PHY.pdf#page=75 (Telangana Board) (English Medium)
http://apscert.gov.in/ebookapp/GeneratePdf (AP Board) (English Medium)
[Author - Anu Nived]
http://i229.photobucket.com/albums/ee78/indianraga/pic/jaltarang-milind-tulankar-500x346.jpg (variation in sound - Jal tarang)
http://www.ekshiksha.org.in/sound_VIII/figure_13.JPG (propagation of sounds in solids)
http://www.ekshiksha.org.in/sound_VIII/figure_11.JPG (propagation of sound in liquids)
https://s-media-cache-ak0.pinimg.com/736x/d1/09/04/d109049b8cd95b32bc1a852c24714085.jpg (Structure of an ear)
[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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