8.P.1.3 Properties and Changes in Matter

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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 melting or freezing.

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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 its identity, such as color, density, or boiling point.

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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.

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What evidence indicates a chemical reaction has occurred?

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Evidence includes production of light/heat, formation of a gas, formation of a precipitate, and color change.

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What is evaporation?

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The process by which liquid water turns into water vapor, often leading to a decrease in volume.

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What is a precipitate?

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A solid that forms and settles out of a liquid mixture during a chemical reaction.

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What is combustion?

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A chemical change that occurs when a substance reacts with oxygen to produce heat and light, commonly known as burning.

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What happens during a chemical reaction?

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Atoms rearrange to form new substances, breaking and forming chemical bonds.

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What is the difference between a physical change and a chemical change?

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A physical change does not alter the substance's chemical identity, while a chemical change results in the formation of new substances.