UBSE - 7 - Science :: Physical and Chemical Changes

Go To: UBSE-Sci-Grade 7

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Course content
Textbook
Teaching learning resources

Course Content / Subtopic list:

Chemical reaction with examples
Physical and chemical changes with examples
Crystallization
Neutralization

Expected Learning Outcome:

SWBAT-

Define a chemical reaction
Differentiate between physical and chemical changes with ex
Describe the process of crystallization

English Medium

English medium textbook

Hindi Medium

Hindi medium textbook

Lesson Plan

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The lesson plan provides an overall picture of what you need to teach. It is recommended that you follow the objectives and the learning outcomes stated in the lesson plan.

We suggest that that you read the chapter thoroughly and research on how to teach the topic effectively to meet the learning outcomes.

Kindly note, while the lesson plan is a guide to teach, you can also add your own teaching elements to enhance the learning process of the children.

[Edition 2022]

Physical and Chemical Changes Lesson Plan - (Lesson Plan - English)

[Edition 2019]

https://drive.google.com/open?id=1ABUB9Z0UjvtqvSFCHFLKYfqKbkLdvRXA (Lesson Plan - English)

https://drive.google.com/open?id=1urU46KD2w9P2Wq0AgwvEg07ew2w9VEEs (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 of the modified version.

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

Videos

[Author - Shachi Patel, Kripa S]

https://www.youtube.com/watch?v=KjcX5UfD8dU (Hindi - Physical and Chemical changes)

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

[Contributor - Suhas B]

Lesson Plan version 1.1 videos

https://www.youtube.com/watch?v=hOhgXCrlDfo (heating of iron in forge)

https://www.youtube.com/watch?v=GjdUfezGxb8 (Burning of magnesium ribbon)

Images

[Author - Anu Nived]

http://image.slidesharecdn.com/physical-and-chemical-change-1224466582409274-8/95/physical-and-chemical-change-6-728.jpg (chemical change)

https://image.slidesharecdn.com/physical-and-chemical-change-1224466582409274-8/95/physical-and-chemical-change-5-728.jpg?cb=1224441397 (chemical change)

http://image.slidesharecdn.com/physical-and-chemical-change-1224466582409274-8/95/physical-and-chemical-change-8-728.jpg (physical change)

Activities

[Author - Arshea Bimal]

1. Cut a piece of paper in four square pieces. Cut each square piece further into four square pieces. Keep these pieces on the floor or a table so that the pieces acquire the shape of the original piece of

paper.Can you join the pieces back to make the original piece? Is there a change in the property of the paper?

2.Group students to play this game:

a) Let one name a common process (eg: rusting of iron)

b) The other will decide if it is a physical or chemical change. The second student an now pick another and name another process. continue...

[Contributor - Suhas B]

Lesson Plan version 1.1 activities

1. Take a square piece of paper and cut it into 4 equal squares. Again take one piece and cut it into 4 squares. Now arrange them to form square, we started with.

2. Take chalk dust from under the board or crush one. Put some water and roll it to form chalk again.

3. Take a magnesium strip and burn it. Note down the reaction equation. Next, dissolve the ash in the water. Again note down the reaction equation.

1. Mg + O2 ----------- MgO

2. MgO + H2O ---------- Mg(OH)2