TNSB - 7 - Science :: Polymer Chemistry

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Go To: TNSB-Sci-Grade 7

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Course content
Textbook
Teaching learning resources

Course Content / Subtopic list:

Polymers and its types
Fibers and types
Characteristics of Synthetic Fibers
Plastics,types,uses of plastics
3R's
Biodegradable and Non biodegradable substances

Expected Learning Outcome:

SWBAT-

Define polymers
List the advantages and disadvantages of synthetic fibers
Differentiate between thermoplastics and thermo-setting plastics
Differentiate between biodegradable and non biodegradable substances

English Medium

English medium textbook
English medium textbook
English medium textbook

Tamil Medium

Tamil medium textbook
Tamil medium textbook
Tamil medium textbook

Lesson Plan

[Contributor - Aishwarya V H]

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=1Ds9y-cmplI605Y_3Zh-yHWIDGmuYn07p (Lesson Plan - English)

https://drive.google.com/open?id=1xOM9lMrQqZSF2erRdByjiax2W08gKiA8 (PPT - English)

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

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

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Activities

[Contributor - Aishwarya V H]

Lesson Plan version 1.1 activities

1. Take an iron stand with a clamp. Take samples of cotton, wool, nylon and silk threads of about 50cm in length. First tie cotton thread to the stand so that it hangs freely from it. At the free end, attach a CD as plate so that weights can be placed on it. Add weights starting from 10 grams one by one, until the thread breaks.

2. Take a piece of cotton cloth and a piece of polyester cloth. Both the pieces of cloth can be of same size. Hold the pieces of cloth using tongsto protect yourself from the flame and heat. Burn both the pieces of cloth one by one and see what happens when they burn

3. Take a piece of cotton cloth of approximately 10cm X 10cm size and a piece of nylon or polyester cloth 10cm X 10 cm in size from an old unusable/ untorn umbrella.

Ask four students to hold the four corners of the piece of cotton cloth and pour a glass of water over it.

4. Collect different kinds of plastic products and look carefully for the resin code and/or acronym on them. With the help of the resin code chart, mark the resin code number, acronym, if you think it is a safer, unsafe or questionable (when you cannot find the resin code on the article) type of plastic.