Difference between revisions of "APSB - 7 - Science :: Changes around us"

[Author - Kripa S]

http://scert.telangana.gov.in/sites/default/files/publication/ebooks/7TM_GENSC.pdf#page=189 (Telangana Board) (Telugu Medium)

http://apscert.gov.in/ebookapp/GeneratePdf (AP Board) (Telugu Medium)

http://scert.telangana.gov.in/sites/default/files/publication/ebooks/7EM_GENSC.pdf#page=171 (Telangana Board) (English Medium)

http://apscert.gov.in/ebookapp/GeneratePdf (AP Board) (English Medium)

[Author - Kripa S]

https://www.youtube.com/watch?v=Nk7UUEY0vZ4 ( Changes around Us)

[Author - Anu Nived]

https://s-media-cache-ak0.pinimg.com/originals/af/a0/f8/afa0f8775ea5c6de7b7a5b1006e3b427.jpg (reversible change)

 http://k8schoollessons.com/wp-content/uploads/2013/02/irreversible-changes-examples-frying.png (irreversible change)

[Author - Kripa S]

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?