Chemical Changes Worksheet (Grade 7 Science)
Explore the fascinating world of chemical changes with this Grade 7 Science worksheet. Learn to identify and differentiate between physical and chemical changes through various examples and questions.
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Chemical Changes Worksheet
Name:
Date:
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Read each question carefully and answer to the best of your ability. Show all your work where applicable.
1. Which of the following is an example of a chemical change?
Melting ice
Cutting paper
Burning wood
Boiling water
2. What is a common sign that a chemical change has occurred?
Change in shape
Change in state (solid to liquid)
Formation of a new substance
Change in size
3. A chemical change is always reversible.
True
False
4. Rusting of iron is a physical change.
True
False
5. A chemical change results in the formation of a substance.
6. The process of burning is an example of a reaction.
7. Describe two common indicators that suggest a chemical change has taken place.
8. Explain the difference between a physical change and a chemical change, providing an example for each.
Use the words below to complete the sentences.
9. In a chemical reaction, the starting materials are called .
10. The new substances formed in a chemical reaction are called .
11. Most chemical changes are .
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