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Questions and Answers
Which of the following situations is an example of a chemical change?
Which of the following situations is an example of a chemical change?
- Grapes getting fermented
- Food getting digested in our body
- Milk left at room temperature during summers (correct)
- An iron tawa/pan/nail left exposed to humid atmosphere
What is the main difference between a physical change and a chemical change?
What is the main difference between a physical change and a chemical change?
- Physical changes involve a change in the nature and identity of the substance, while chemical changes do not
- Physical changes only involve a change in appearance, while chemical changes involve a change in composition (correct)
- Physical changes can be reversed, while chemical changes cannot
- Physical changes are caused by temperature, while chemical changes are caused by pressure
What is the purpose of the activities mentioned in the text?
What is the purpose of the activities mentioned in the text?
- To study the behavior of different substances
- To demonstrate physical changes of matter
- To observe the effects of temperature on substances
- To explain the concept of chemical reactions (correct)
Why is it important to wear eye protection during Activity 1.1?
Why is it important to wear eye protection during Activity 1.1?
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What is the outcome of burning a magnesium ribbon in air?
What is the outcome of burning a magnesium ribbon in air?
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