Practice Additional Activities (5) - Physical and Chemical Changes

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8 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
2 questions · about 1 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What happens when you burn a candle?
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Consider what happens to the wax.
Question 2.
What is a physical change? Give one example.
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Think of something that can revert back to its original state.
3Question 3.
What is a defining characteristic of a chemical change?
- No new substances are formed
- New substances are created
- The change is always reversible
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Think about changes in identity.
4Question 4.
Is melting ice a physical or chemical change?
- True
- False
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Consider if anything new is created.
Question 5.
You have three substances: ice, bread, and iron. Identify the type of change for each when subjected to heat, and explain your reasoning.
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Consider what happens when heat is applied.
Question 6.
Create a flow chart that differentiates physical changes from chemical changes, using examples and key characteristics.
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What are main distinctions between the two types of changes?

4 more questions in this section. Enroll free to practise them all.