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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a physical change? Provide an example.
💡 Hint: Think about changes that you can reverse.
Question 2
Easy
Name a chemical change you observe in daily life.
💡 Hint: Consider items that transform into different 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
Which of the following is a characteristic of a physical change?
- New substances are formed
- No energy change
- Usually irreversible
💡 Hint: Consider what happens to the substances involved in physical changes.
Question 2
True or False: Chemical changes can often be reversed.
- True
- False
💡 Hint: Think about examples like burning paper.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a sample of sodium bicarbonate (baking soda). Describe a physical and a chemical change it can undergo.
💡 Hint: Consider how the substance's identity changes.
Question 2
Explain how energy changes during chemical reactions and provide an example.
💡 Hint: Think of how reactions can feel hot or cold.
Challenge and get performance evaluation