JACB - 8 - Science :: Sound
Go To: JACB-Sci-Grade 8
Course Content / Subtopic list:
- Sound
- Sound is produced by vibrating bodies
- Vibration
- Different instruments produce different sounds
- How do humans produce sounds
- Propagation of Sound through a medium
- How sounds travel in a medium ( air , water and solid )
- We hear Sound through our ears
- Structure of human ear
- Amplitude , time period , and frequency of vibration , loudness and pitch
- Different types of sounds- audible , ultrasound and inaudible sounds , noise and music
- Noise pollution
- Measures to limit noise pollution
Expected Learning Outcome:
SWBAT-
- Define Sound
- Identify different instruments and their vibrating surface
- Explain how do humans produce sounds
- Explain Propagation of Sound through different mediums like air , water and solid
- Explain the parts of human ear and their functions
- Define amplitude ,time period and frequency of vibration , loudness and pitch
- Differentiate between Different types of sounds like Audible , ultrasound and inaudible
- Distinguish between noise and music
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=1jrptFWMfym-_G3r_sgFx-3q21bPTKcK8 (Lesson Plan - English)
https://drive.google.com/open?id=1MOrK51kzvlX8qp-yWr0QqWc66x-ipixC (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=p4FQYTfXuFU ( Sound requires a medium )
https://www.youtube.com/watch?v=sHTXhz6xUmA (Sound - Hindi)
[Contributor - Ankita Srivastava]
Lesson Plan version 1.1 videos
https://www.youtube.com/watch?v=VADGnJZ79Yo&index=8&list=PLPbVevbMS3MpOAhpkXosGXz0wdOoQiKX3 (up to 8:25 min , different sounds around us)
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 sound is produced by humans)
https://www.youtube.com/watch?v=p4FQYTfXuFU (propogation of sound)
https://www.youtube.com/watch?v=r8RXpIeBo5k (How we hear sound)
https://www.youtube.com/watch?v=T8lKKlnnC6M (How we hear sound)
https://www.youtube.com/watch?v=CY04lXo9brE (Amplitude , time period, frequency)
https://www.youtube.com/watch?v=lGYUVEj05yU (Amplitude , time period, frequency)
https://www.youtube.com/watch?v=sHTXhz6xUmA. (Summary)
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 - Arshea Bimal, 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=p64BlQfZsTk (roaring bottle)
[Contributor - Ankita Srivastava]
Lesson Plan version 1.1 activities
1. Take a scale and hold its one end firmly on the table with one hand. Tap the free end of the scale with the other hand. Observe.
2. Touch a bell when not in use. Now tap the bell with an iron rod and touch it when it is producing the sound. Do you feel any vibrations?
3. Take two rubber strips of the same length and width. Put them one above the other. Hold them at both ends and stretch them tight. Blow air through the split between them.
4. With the help of the vacuum pump when the air is removed from the bell jar gradually, the sound gets feebler.
5. 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.
6. 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?
7. 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.
8.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.
Additional Aids
[Contributor - Ankita Srivastava]
Lesson Plan version 1.1 PPT
https://drive.google.com/open?id=1MOrK51kzvlX8qp-yWr0QqWc66x-ipixC
Worksheets
[Contributor - Ankita Srivastava]
https://drive.google.com/open?id=1dBFO_Dsq7j1FfcSyWo-L4zuYO3i64rrg (Worksheet 1)
https://drive.google.com/open?id=1PSKRcJNNR20NOMjRYzlb7_g4BgRK0xFi (Worksheet 2)
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