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Unit 1: Matter
Term | Definition |
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Matter | Anything that has mass and takes up space. |
Physical Property | A characteristic of a substance that does not involve a chemical change, such as density, color, or hardness. |
Chemical Property | A property of matter that describes a substance's ability to participate in chemical reactions. |
Physical changes | A change of matter from one form to another without a change in chemical properties. |
Chemical changes | A change that occurs when one or more substances change into entirely new substances with different properties. |
Extensive property | A property that depends on the extent or size of a system. |
Intensive property | A property that does not depend on the amount of matter present, such as pressure, temperature, or density. |
Ductility | The ability of a substance to be hammered thin or drawn out into a wire. |
Malleability | The ability of a substance to be hammered or beaten into a sheet. |
Volume | A measure of the size of a body or region in three-dimensional space. |
Compressibility | The measure of how much a given volume decreases when placed under pressure. |
Density | The ratio of the mass of a substance to the volume of the substance; often expressed as grams per cubic centimeter for solids and liquids and as grams per liter for gases. |
Evaporation | The change of a substance from a liquid to a gas. |
Sublimation | The process in which a solid changes directly into a gas. |
Vaporization | The process by which a liquid or solid changes to a gas. |
Element | A substance that cannot be separated or broken down into simpler substances by chemical means. |
Compound | A substance made up of atoms of two or more different elements joined by chemical bonds. |
Heterogeneous Mixture | Composed of dissimilar components. |
Homogeneous Mixture | Describes something that has a uniform structure or composition throughout. |
Atom | The smallest unit of an element that maintains the chemical properties of that element. |