Chemistry: Classification of Matter

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What is matter?

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Matter is anything that has mass and takes up space.

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What is a homogeneous mixture?

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A homogeneous mixture is a mixture that has a uniform composition throughout, such as milk.

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What is a heterogeneous mixture?

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A heterogeneous mixture is a mixture that does not have a uniform composition, such as a salad.

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What is a chemical change?

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A chemical change is a process that involves the transformation of one or more substances into different substances, such as burning wood.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as melting ice.

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What is an example of a chemical change?

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Burning wood is an example of a chemical change.

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What is an example of a physical change?

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Melting ice is an example of a physical change.

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

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A chemical change results in the formation of new substances, while a physical change does not change the chemical composition of the substance.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.

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What is a pure substance?

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A pure substance is a material that has a constant composition and consistent properties throughout.