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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a physical change?
💡 Hint: Think of melting ice.
Question 2
Easy
Provide an example of a chemical change.
💡 Hint: Consider something that creates new substances.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What type of change occurs when ice melts?
- Chemical Change
- Physical Change
- None of the above
💡 Hint: Think about whether the original substance is still identifiable.
Question 2
True or False: Chemical changes can be easily reversed.
- True
- False
💡 Hint: Consider if the new substances can turn back into the original material.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
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?
Question 2
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?
Challenge and get performance evaluation