APSB - 8 - Science :: Sound

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Go To: APSB-Science-Grade 8

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Course content
Textbook
Teaching learning resources

Course Content / Subtopic list:

Production of sound
Musical instruments
Sounds produced by human beings
Propagation of sound
How do we hear sound?
Characteristics of sound
Normal Sound consists of mixed frequencies
Noise and music
Audible range
Sound pollution

Semester 1

Physics TextBook Link
Biology TextBook Link

Semester 2

Physics TextBook Link
Biology TextBook Link

Lesson Plan

[Contributor - Ankita Srivastava]

Dear Volunteer,

Please find below the detailed lesson plan and PPT for this chapter in the language mentioned against the respective link. While the lesson plan will give an overall flow of the lesson, the PPT will include lesson flow as well as the presentations for the class.

https://drive.google.com/open?id=16fZ_aMNqnDWiUdOsHQ3uEdXqaaf2_AWN (Lesson Plan - English)

https://drive.google.com/open?id=13IIRda2dMEUL5c-LkisXlkHY1EL0PMSi (PPT - English)

You may use the content as it is or download and modify them to suit the students requirements.

If you feel any major modifications or additions are carried out by you in the form of adding any new activity, presentations, videos etc. we request you to send the modified version to submitcontent@evidyloka.org for enabling upload the modified version.

The worksheets of the lesson can be accessed from the worksheet tab.

Kindly rate the lesson plan and share your suggestions and comments on the lesson plan in the comments box below. Your valuble suggestions and comments will help us to improve the content.

Videos

[Author - Kripa S]

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

[Contributor - Ankita Srivastava]

Lesson Plan version 1.1 videos

https://www.youtube.com/watch?v=wI3ZJwkD-Fc (What is sound and how it is produced)

https://www.youtube.com/watch?v=Dz2Lj_cJ5QM (from 2:00 min to 3:08 min, how sound is produced by humans)

https://www.youtube.com/watch?v=ggPOhxtWKVw  (How is sound produced by humans)

https://www.youtube.com/watch?v=CzG0ioYIIFs (propogation of Sound)

https://www.youtube.com/watch?v=T8lKKlnnC6M (How we hear sound)

https://www.youtube.com/watch?v=lGYUVEj05yU (Amplitude)

https://www.youtube.com/watch?v=CY04lXo9brE (Amplitude)

https://www.youtube.com/watch?v=p7XkZleu9aY (Noise pollution)

Images

[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)

Activities

[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)

[Contributor - Ankita Srivastava]

Lesson Plan version 1.1 activities

1. Sit quietly for a while and listen to sounds. Prepare a list of sounds heard and the sources from which they might have originated.

2. Make a student to stand at the black board such that his face is turned towards the black board and ask other student in the class to make different sounds. The student at the board should tabulate the sounds he heard and sources of those sounds.

3. Touch a bell when not in use. Now tap the bell with an iron rod and touch it when it is producing the sound.

4. Take a plastic bottle and a cell phone. Cut the top of the bottle so that it looks like a glass. Play songs on the mobile phone in high volume and place it in the bottle. Close the mouth of bottle with a balloon using rubber band so that it covers the bottle and stretch it tightly so as to behave like a diaphragm. Place some sugar crystals or small sand particles and observe the movement of particles.

5. Take 4to5 metal or glass bowls or tumblers. Fill them with water in increasing order. Strike gently each bowl with a spoon.

6. Ask a friend to raise his neck up. Stretch a chocolate wrapper across his mouth and ask him to blow air on the wrapper forcibly. Observe the changes in movement at his throat.

7. With the help of the vacuum pump when the air is removed from the bell jar gradually, the sound gets feebler.

8. Take two pebbles or marbles and submerge them in a bucket of water. Then tap the pebbles together under water. Listen to the sound by keeping your ear on the outer surface of bucket and then away from it.

9. Stand at the end of a big table and make a friend stand at the other end. Ask the friend to knock lightly on the table. You will hear a faint sound. Now you press your ear to the table and ask the friend to repeat the knock. What difference do you notice?

10. Materials: Two empty paper cups, a string, and matchsticks. Procedure: Take two empty paper cups. Make a small hole at the bottom of each cup and pass the ends of a string through the holes. Tie the ends to match sticks to hold them in place. Hold one cup near your ear and ask your friend to speak in other cup.

11. Take two balloons, one filled with air and the other with water. Press the balloon filled with air against your ear. Rub a finger on the balloon and listen to the sound. Repeat the same activity with water balloon.

12. Place the blade/scale on the table, with 10cm of the blade on the surface of the table and rest of it in air. Keep a heavy brick on one end of the 10 cm blade/ scale kept on table. Vibrate the blade gently and observe the vibrations and simultaneously listen to the sounds. Repeat the same 2-3 times and record observations.

13. Place the first blade/scale on the table, with 10cm portion of the blade on the table and rest of it in air. Keep brick as weight on the 10 cm portion of the blade/scale kept on table. Place the second blade/scale on the table with 25cm on the table and 5cm in air. Keep brick as weight on the scale/blade. Vibrate both blades with same force. Observe the vibrations and listen to the sounds produced.

Key Words

Additional Aids

[Contributor - Lalitha Bhattiprolu]

https://drive.google.com/open?id=0BzNF2YyqQxJ-SFZtRUhkT2JZeTA

[Contributor - Ankita Srivastava]

Lesson Plan version 1.1 PPT

https://drive.google.com/open?id=13IIRda2dMEUL5c-LkisXlkHY1EL0PMSi

Transliteration

[Author - Kalanadhabhatla Shweta]

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