Unit 1.2 Test Part 2 2024

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What is a Colloid?

Back

A colloid is a mixture where tiny particles of one substance are evenly distributed throughout another substance, but they do not settle out. Examples include milk and fog.

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What is a Chemical Change?

Back

A chemical change is a process where a substance transforms into a different substance with a new chemical composition, such as when sugar burns and turns black.

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What describes a Gas?

Back

A gas has an indefinite shape and an indefinite volume, meaning it expands to fill its container.

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What are Pure Substances?

Back

Pure substances are materials that have a uniform and definite composition. Elements and compounds are classified as pure substances.

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What is the difference between Physical Change and Chemical Change?

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A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

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What is a Physical Property?

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A physical property is a characteristic of a substance that can be observed or measured without changing its identity, such as color, melting point, and density.

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What is a Chemical Property?

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A chemical property describes a substance's ability to undergo a specific chemical change, such as flammability or reactivity with acids.

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What is a Mixture?

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A mixture is a combination of two or more substances where each retains its own properties. Mixtures can be homogeneous or heterogeneous.

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What is a Solution?

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A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent), such as saltwater.

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What is a Suspension?

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A suspension is a heterogeneous mixture where solid particles are dispersed in a liquid but will settle over time, like muddy water.