2.6 - Conclusion
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Practice Questions
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What is a physical change?
💡 Hint: Think of melting ice.
Provide an example of a chemical change.
💡 Hint: Consider something that creates new substances.
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Interactive Quizzes
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What type of change occurs when ice melts?
💡 Hint: Think about whether the original substance is still identifiable.
True or False: Chemical changes can be easily reversed.
💡 Hint: Consider if the new substances can turn back into the original material.
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Challenge Problems
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You observe two changes: mixing vinegar and baking soda, and melting wax. Classify each change and justify your answers. How do energy changes factor into your reasoning?
💡 Hint: What sign can you identify in the vinegar-baking soda mixture?
A metal rusts over time when exposed to air and moisture. Explain the process and why its classification as a chemical change is valid.
💡 Hint: What happens to the properties of the metal during rusting?
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