Difference between revisions of "TNSB - 6 - Science :: Changes around us"

[Author - Kripa S]

http://www.textbooksonline.tn.nic.in/Books/Std06/Std06-I-MSSS-TM-2.pdf#page=34 (Tamil Medium)

http://www.textbooksonline.tn.nic.in/Books/Std06/Std06-I-MSSS-EM-2.pdf#page=31 (English Medium)

[Author - Kripa S]

https://www.youtube.com/watch?v=BgM3e8YZxuc (physical vs chemical change)

[Author - Anu Nived]

http://i93.photobucket.com/albums/l77/afkimel/Misc/158821408_zpsc6a1cb59.jpg (slowchange - baby to adult)

http://sew-lexicon.com/wp-content/uploads/2017/04/LED-LIGHTING-A.jpg (fast change -lighting bulb)

http://bishopsworth.wikispaces.com/file/view/egg.gif/35312657/egg.gif (irreversible change)

http://2.bp.blogspot.com/-4_W4plBdXEQ/Uox4KWIukyI/AAAAAAAAACg/dPHCDgrt9NM/s1600/orange_juice.gif (reversible change)

http://4.bp.blogspot.com/-6j7hrO2o3Rc/U1FmrpYzELI/AAAAAAAAACI/LzoqysbJbEg/s1600/mold+on+bread.jpg (undesirable change - rotten  bread)

http://www.masterclockrepair.com/images/675_moon_phase_crop.jpg (periodic changes)

http://www.chesapeakebay.net/images/issues/weather.jpg (non periodic change - flood)

[Author - Kripa]

1. Pick three students. Ask each student what happens when they

a) rolled out atta to make a roti

b) stretch a rubber band

c) Fold a piece of paper

2. Explain reversible and irreversible changes:

a) Measure the length of a piece of paper, fold it and then measure again. The shape of the paper changes. Unfold the piece of paper. It is now its original length.

b) Make a hole in a piece of paper. Ask the students to fill in the hole and make the paper as it was before. Is it possible?

[Author - Madhumitha Rajamohan]

https://drive.google.com/open?id=0BzNF2YyqQxJ-aXRJZmZrblF6Mnc

[Author - Madhumitha Rajamohan]

https://drive.google.com/open?id=0BzNF2YyqQxJ-cU82OXI2MEs4UXc