Properties & Changes of Matter Pretest

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What is a chemical property?

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A characteristic of a substance that can only be observed during a chemical reaction, such as reactivity, flammability, and corrosion.

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What is a physical property?

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A characteristic of a substance that can be observed without changing its chemical identity, such as color, density, and boiling point.

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What is a chemical change?

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A process where one or more substances are transformed into different substances with new chemical and physical properties.

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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.

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What is density?

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The mass of a substance divided by its volume, often used to compare how heavy a substance is for a given space.

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What happens to the mass of a substance during a physical change?

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The mass remains the same; it is conserved.

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What is an indicator of a chemical change?

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Signs that a chemical change has occurred, such as color change, gas production, temperature change, or formation of a precipitate.

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

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

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What does it mean for a substance to be flammable?

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It means the substance can easily ignite and burn in the presence of oxygen.

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What is reactivity in terms of chemical properties?

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Reactivity refers to how readily a substance combines chemically with other substances.