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Physical Changes - Physical and Chemical Changes - CBSE Class 7 Science Video Lecture

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FAQs on Physical Changes - Physical and Chemical Changes - CBSE Class 7 Science Video Lecture

1. What is the difference between physical and chemical changes?

Ans. Physical changes are changes that only affect the physical properties of a substance, such as shape, size, or state of matter, without altering its chemical composition. On the other hand, chemical changes result in the formation of new substances with different chemical properties from the original substance.

2. Can you provide some examples of physical changes?

Ans. Yes, examples of physical changes include melting of ice, boiling of water, tearing a piece of paper, dissolving salt in water, and crushing a can.

3. What are some examples of chemical changes?

Ans. Examples of chemical changes include burning of wood, rusting of iron, digestion of food, baking a cake, and fermenting grapes to make wine.

4. How can we distinguish between physical and chemical changes?

Ans. Physical changes can be reversed by simple physical means, such as melting or freezing, while chemical changes are usually irreversible. Additionally, physical changes do not involve the formation of new substances, whereas chemical changes result in the formation of new substances.

5. Is breaking a glass bottle a physical or chemical change?

Ans. Breaking a glass bottle is a physical change because it only affects the physical properties of the glass, such as its shape and size, without altering its chemical composition.

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Physical Changes - Physical and Chemical Changes - CBSE Class 7 Science for Class 72024 is part of Class 7 preparation. The notes and questions for Physical Changes - Physical and Chemical Changes - CBSE Class 7 Science have been prepared according to the Class 7 exam syllabus. Information about Physical Changes - Physical and Chemical Changes - CBSE Class 7 Science covers all important topics for Class 72024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Physical Changes - Physical and Chemical Changes - CBSE Class 7 Science.

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