Physical and Chemical properties and changes.

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What is a Chemical Change?

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A process where substances combine or break apart to form new substances, often accompanied by energy changes, color changes, or gas production.

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What is a Physical Change?

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A change that affects one or more physical properties of a substance without altering its chemical composition, such as changes in state or shape.

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What is a Physical Property?

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A characteristic of a substance that can be observed or measured without changing the substance's identity, such as color, boiling point, or density.

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What is a Chemical Property?

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A characteristic of a substance that describes its ability to undergo a specific chemical change, such as flammability or reactivity with acids.

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Example of a Chemical Change: Burning Wood

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When wood burns, it reacts with oxygen to form ash, carbon dioxide, and water, indicating a chemical change.

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Example of a Physical Change: Folding Origami

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Folding paper into different shapes does not change the chemical composition of the paper, demonstrating a physical change.

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What happens during an Explosion of Fireworks?

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Fireworks undergo a chemical change as the chemicals react to produce light, sound, and gas.

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What is Boiling Point?

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The temperature at which a liquid turns into vapor, a physical property of the substance.

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What does Changing Color indicate?

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Changing color often indicates a chemical change, as it may signify the formation of new substances.

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What is the difference between Physical and Chemical Properties?

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Physical properties can be observed without changing the substance, while chemical properties can only be observed during a chemical reaction.