worksheet on chemical vs physical properties and changes

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04-02-2025

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This worksheet will help you differentiate between chemical and physical properties and changes. Remember, a physical property can be observed or measured without changing the substance's composition, while a chemical property describes how a substance reacts with other substances or changes into a new substance. Similarly, a physical change alters the form or appearance of a substance but not its chemical composition, whereas a chemical change (or chemical reaction) results in the formation of one or more new substances.

Part 1: Identifying Properties

Instructions: Identify each property listed below as either a chemical property or a physical property.

Part 2: Identifying Changes

Instructions: Identify each change described below as either a chemical change or a physical change. Briefly explain your reasoning.

1. Melting an ice cube: ____________________________________________________________________________
2. Burning wood: __________________________________________________________________________________
3. Crushing a can: _______________________________________________________________________________
4. Digesting food: _______________________________________________________________________________
5. Boiling water: ________________________________________________________________________________
6. Mixing salt and water: __________________________________________________________________________
7. Baking a cake: _______________________________________________________________________________
8. Tearing paper: _______________________________________________________________________________
9. Iron rusting: _________________________________________________________________________________
10. Dissolving sugar in tea: _______________________________________________________________________

Part 3: Applying Your Knowledge

Instructions: For each scenario, identify the chemical and/or physical properties and changes involved.

Scenario 1: You are making a chocolate chip cookie. You mix flour, sugar, butter, eggs, chocolate chips, and baking soda. Then, you bake the mixture in an oven at 350°F (175°C).

• Physical properties involved:
• Physical changes involved:
• Chemical properties involved:
• Chemical changes involved:

Scenario 2: A silver spoon tarnishes over time, developing a dark coating.

• Physical properties involved:
• Physical changes involved:
• Chemical properties involved:
• Chemical changes involved:

Part 4: Challenge Question

Explain why it is important to distinguish between chemical and physical changes in everyday life, giving at least two examples.

This worksheet provides a foundation for understanding chemical and physical properties and changes. Remember to consult your textbook or other resources if you need additional help. Understanding these concepts is crucial for comprehending many scientific principles.