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Make something more difficult

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represent as being larger or bigger

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Explain or make clear of something

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Communicate to a 3rd party

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is a system of acquiring knowledge through observation and the experimental testing of hypotheses

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A new material formed in a chemical reaction.

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Substances initially present in a chemical reaction that are consumed during the reaction to make products.

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that, in a closed system, matter cannot be created or destroyed. It can change forms but is conserved.

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is a chemical reaction that releases energy by light or heat.

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a chemical reaction that is accompanied by the absorption of heat, or an organism that generates heat to maintain its temperature

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cause a substance to be deposited in solid form from a solution

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a combination of two or more pure substances in which the original substances retain their chemical

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A mixture which has uniform composition and properties throughout

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a combination of two or more pure substances in which each pure substance retains its individual chemical properties.

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a substance formed when two or more chemical elements are chemically bonded together.

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substances that are made of only one type of atom or only one type of molecule

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the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase

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any process in which a substance combines with oxygen to produce heat and light

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The component of a solution that is present in the greatest amount

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a substance dissolved in another substance

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Mixture of 2 or more substances

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A process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.

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a substance that speeds up a chemical reaction

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A substance that undergoes a distinct observable change when conditions in its solution change.

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Chemical reaction involving the rearrangement of the atoms of one or more substances

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Are changes affecting the form of a chemical substance, but not its chemical composition

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To make or become different

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Is any of a material's properties that becomes evident during, or after, a chemical reaction

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used to observe and describe matter

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Physical substance in general