Classification of matter

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Is burning wood a chemical or physical change?

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Chemical change: A process where a substance transforms into a different substance with different properties.

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A mixture that is NOT evenly distributed is called ....

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Heterogeneous: A mixture in which the components are not uniformly distributed.

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If you change a substance into a new substance...

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Chemical Change: A change that results in the formation of new chemical substances.

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Which one of these pictures represents a mixture? (Options: 1, 2, 3, 1, 2 and 3)

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Picture 2: Represents a mixture, showing components that are not uniformly distributed.

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A substance with two or more elements that are combined in a fixed proportion is called...

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Compound: A substance formed when two or more elements are chemically bonded in a fixed ratio.

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What is a physical change?

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Physical Change: A change that affects one or more physical properties of a substance without altering its chemical composition.

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What is a homogeneous mixture?

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Homogeneous Mixture: A mixture that has a uniform composition throughout, such as saltwater.

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What is an element?

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Element: A pure substance that cannot be broken down into simpler substances by chemical means.

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What is a solution?

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Solution: A homogeneous mixture where one substance (solute) is dissolved in another (solvent).

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What is the difference between a compound and a mixture?

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Compound: Chemically bonded elements in fixed proportions; Mixture: Physically combined substances that retain their individual properties.