TNSB - 6 - Science :: Chemistry in Daily Life

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[Contributor - Preethi Saravanakumar]

Objective: To teach the students how we produce many things which are very useful in our daily life, based on the chemical properties of naturally available raw materials.

Subtopics to be covered:

Cement and its uses
Plastics (Types and uses of plastics)
Glass and its uses
Soap -preparation and uses
Fibres (Types of fibres and their uses)

Learning Outcome:

Students understand the use of Chemistry in daily life.

[Contributor - Kripa S]

http://www.textbooksonline.tn.nic.in/Books/Std06/Std06-III-MSSS-TM-2.pdf#page=25 (Tamil Medium)

http://www.textbooksonline.tn.nic.in/Books/Std06/Std06-III-MSSS-EM-2.pdf#page=25 (English Medium)

[Contributor - Kripa S]

http://ricerca.usb.it/uploads/pics/muro_mattoni.gif (cement)

http://cdn.xl.thumbs.canstockphoto.com/canstock6845097.jpg (plastic)

https://image.slidesharecdn.com/syntheticfibres-141228032752-conversion-gate02/95/synthetic-fibres-3-638.jpg?cb=1419758947 (Types of synthetic fibres)

https://image.slidesharecdn.com/fibreandhairanalysis-140824061341-phpapp01/95/fibre-and-hair-analysis-5-638.jpg?cb=1408860884 (natural fibres)

[Contributor - Vikas Kumar]

1. Ask some of the students to gather a handful/spoonful of cement from any site. In the class, ask them to dissolve the cement in any container (cup, beaker). Stir the mixture with the spoon and leave it for one day (The cement will ossify). Show the result the activity to students and ask them to guess various uses of cement based on what they saw.

2. Plastic have various uses and can be classified into types – thermostats (non reshapable) and thermoplastic (reshapable). Ask the students to identify:

Various plastics seen in their environment. Make a list of them
Guess on what would happen if we heat it.
Identify which is thermostat and which is thermoplastic.

[Contributor - Gayathri Arun]

https://drive.google.com/open?id=0BzNF2YyqQxJ-U3B5Y0E2RDNVa0k (Answer Key 2)

[Contributor - Ramkee]

Term	Transliterated Term	Translated Term
Thermo Plastics	தெர்மோ பிளாஸ்டிக்ஸ்	வெப்ப நெகிழிகள்
contagious	கண்டெஜீயெஸ்	தொற்றக்கூடிய
Non Inflammable	நான் இன்ப்பிளேமப்பில்	எளிதில் எரியாத
Degrade	டிகிரேட்	வெப்பநிலைப் பிறழ்ச்சி, தரத்தைக் குறை
Viscous Liquid	விஸ்கஸ் லிக்விட்	பிசுபிசுப்பான திரவம்
Molten Glass	மோல்டன் க்ளாஸ்	உருக்கிய கண்ணாடி
Brittle	ப்ரிட்டில்	நொறுங்கத்தக்க
Annealing	அன்னீலிங்	பதனாற்றுதல்
Fibres	பைபர்ஸ்	இழை
Synthetic	சிந்தெடிக்	செயற்கையான
Fur	பற்	மென்மயிர்
Cellulose	செல்லுலோஸ்	மரக்கூழ்