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2.C. Short answer questions1. What are reversible changes? Give two examples.Name three physical states of water. How can you convert the liquisolid state?3. What are irreversible changes? Give two examples.4. Why is burning of paper an irreversible change?What are physical changes? Give two examples.6. What are chemical changes? Give two examples.What is the effect of heating and cooling on some materials?D. Long answer questions5.7.1. Explain why melting of butter is reversible, whereas curdling of m2. Explain why tearing of paper is a physical change, whereas burninchange.3. Give an example of expansion each in solid, liquid, and gas.4. Give an example of contraction each in solid, liquid, and gas, |
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