Match the following: 1. Turning of milk into curd (a) Desirable change 2. Change of seasons (b) Chemical change 3. Change in length (c) Slow change 4. Swinging of pendulum (d) Heating 5. Blooming of flowers (e) Periodic change

1-b Turning of milk into curd is a chemical change. Milk has a different composition than curd. This change is a permanent and an irreversible change. 2-c Revolution of the Earth on its tilted axis around the sun causes the change in seasons. Change of seasons is a slow change. 3-d Change in length is due to heating. Because, heating causes expansion of metals. 4-e Swinging of pendulum is a periodic change because they change regularly with time. 5-a Blooming of flowers is a desirable change. As everyone loves flowers. On fertilisation, flowers turn into fruits which have seeds in them. Column A Column B 1. Turning of milk into curd (b) Chemical change 2. Change of seasons (c) Slow change 3. Change in length (d) Heating 4. Swinging of pendulum (e) Periodic change 5. Blooming of flowers (a) Desirable change

E M B I B E

Interactive Science>Chapter 6 - Changes Around Us>SUMMATIVE ASSESSMENT>Q C

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6th CBSE

IMPORTANT

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Mixing two substances always causes a physical change.

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Important Questions on Changes Around Us

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6th CBSE

IMPORTANT

Interactive Science>Chapter 6 - Changes Around Us>SUMMATIVE ASSESSMENT>Q C

We cannot get back the original substances in case of chemical changes.

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6th CBSE

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Interactive Science>Chapter 6 - Changes Around Us>SUMMATIVE ASSESSMENT>Q D

Match the following:

1. Turning of milk into curd	(a) Desirable change
2. Change of seasons	(b) Chemical change
3. Change in length	(c) Slow change
4. Swinging of pendulum	(d) Heating
5. Blooming of flowers	(e) Periodic change