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A system where both energy and matter can be exchanged with the surroundings.

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A system where no reactants or products can escape, only heat can be exchanged freely.

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Matter can neither be created nor destroyed. The atoms rearrange to form new substances.

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State of matter with definite shape and volume. Particles are closely packed, yet still vibrate.

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State of matter with indefinite shape and volume. Particles are moving fast and far apart.

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Phase change from a solid to a liquid.

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Phase change from a liquid to a solid.

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Phase change from a liquid to a gas. (boiling & evaporation)

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Phase change from a gas to a solid.

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Phase change from a gas to a liquid.

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Phase change from a solid to a gas.

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State of matter with indefinite shape and definite volume. Particles are close together, but flow past each other.

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When a substance changes from one state of matter to another.

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Two or more substances that are not chemically combined.

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Symbolic representations of chemical reactions.

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The new substances that are created after a chemical reaction.

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The substances at the beginning of a chemical reaction.

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A solid substance separated from a solution by a chemical change.

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When two or more substances combine in ways that make a new substance form that have different properties from the beginning materials.

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Measurement of how strong or resistant a material is.

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A conclusion reached through evidence and reasoning.

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Something perceived using the five senses.

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An observation that is descriptive.

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An observation that is measurable.

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The ability of a solid substance to be dissolved in a liquid.

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The temperature at which a liquid begins to turn into a gas.

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The temperature at which a solid begins to turn into a liquid.

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A mixture that is not the same throughout.

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A mixture that is the same throughout.

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A group of atoms chemically bonded together.

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Measurable quantity of a substance = mass per volume. (mass/volume)

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The amount of space that a substance occupies.

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A substance that is composed of two or more different elements.

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A substance that is made up of two or more different types of substances.

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Substance that is made up of only one type of atom or molecule.

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Anything that has mass and takes up space.

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A substance that cannot be broken down into simpler substances and is composed of only one type of atom.

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The amount of matter in an object or substance.

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A unique characteristic of a substance that helps identify and differentiate between substances.

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The basic unit of a chemical element.