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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is a chemical change?
💡 Hint: Think about changes you observe that can't be reversed.
Question 2
Easy
Name one example of a chemical change.
💡 Hint: Consider changes where something is consumed or transformed.
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 sign of a chemical change?
- Change in color
- Change in shape
- Dissolving
💡 Hint: Consider changes that alter the materials at a molecular level.
Question 2
True or False: Chemical changes are usually reversible.
- True
- False
💡 Hint: Think about examples like cooking or burning.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You mix vinegar and baking soda. Describe the chemical changes and what evidence supports them.
💡 Hint: Consider the signs of reactions.
Question 2
Describe the energy change when wood burns. What products result from this change?
💡 Hint: Focus on what happens before and after burning.
Challenge and get performance evaluation