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Questions and Answers
Which one of the following is an example of a physical change?
Which one of the following is an example of a physical change?
- Rusting of iron
- Cooking an egg
- Melting of ice (correct)
- Burning of paper
What is an example of a chemical change mentioned in the text?
What is an example of a chemical change mentioned in the text?
- Cooking an egg
- Rusting of iron (correct)
- Burning of paper
- Melting of ice
What happens to the size of paper and chalk during Activities 5.1 and 5.2?
What happens to the size of paper and chalk during Activities 5.1 and 5.2?
- It is not mentioned
- They decrease in size
- They remain the same size
- They increase in size (correct)
What happens to the color of the tip of a hack-saw blade when heated on a gas stove?
What happens to the color of the tip of a hack-saw blade when heated on a gas stove?
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What is the term used for a change in which a substance undergoes a change in its physical properties?
What is the term used for a change in which a substance undergoes a change in its physical properties?
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What happens when a magnesium ribbon is burned?
What happens when a magnesium ribbon is burned?
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Which of the following is NOT true about rust?
Which of the following is NOT true about rust?
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What does the arrow in a chemical equation imply?
What does the arrow in a chemical equation imply?
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What caution should be taken when looking at a burning magnesium ribbon?
What caution should be taken when looking at a burning magnesium ribbon?
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What should not be done at this stage when balancing chemical equations?
What should not be done at this stage when balancing chemical equations?
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