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Unit 1 Day 1
Matter: TEK 4(B) Extentensive & Intensive Proprties / TEK4(C) Compare the states
| Term | Definition |
|---|---|
| Atom | The smallest unit of an element that has all of the properties of that element; contains a nucleus within a surrounding electron cloud |
| Atomic Mass | The weighted average mass of an element based on the abundances of the naturally occurring isotopes of that element |
| Chemical Change | A change that occurs when a new substance is created with different properties; observable as a color change, the production of gas or a precipitate, or the release of heat or light |
| Chemical Property | Characteristic that can only be observed or measured through a chemical reaction |
| Colloid | A homogeneous mixture in which the particles are indefinitely suspended in the medium, which may be a gas, a liquid, or a solid |
| Compound | A substance composed of multiple elements combined in fixed proportions |
| Condensation | The process by which a sample of matter changes from a gaseous state to a liquid state |
| Density | The quantity of mass per unit volume |
| Deposition | The process by which a sample of matter changes directly from the gaseous state to the solid state |
| Element | One of the primary substances that make up matter and cannot be chemically broken down or converted into other substances; defined by the atomic number |
| Evaporation | The process by which matter on the surface of a liquid changes from a liquid to a vapor |
| Extensive Property | Property of a substance that is dependent on the amount of the substance present |
| Fluid | A state of matter that has no fixed shape or structure, such as a liquid or a gas |
| Freezing Point | the temperature at which a liquid turns into a solid when cooled |
| Gas | A state of matter where the shape and volume are variable and dependent on the shape of the closed container, and where the particles are completely independent of each other |
| Heterogeneous Mixture | A mixture with a nonuniform composition in which the individual components are distinct and visible |
| Homogeneous Mixture | A mixture with a uniform composition |
| Intensive Property | Property of a substance that is not dependent on the amount of the substance present |
| Liquid | A state of matter where the shape is variable and dependent on the bottom of the container, where the volume is constant, and where the particles move independently within the liquid |
| Mass | A measure of how much matter is present in a substance |
| Matter | Anything that has volume and mass |
| Physical Change | Any alteration to a substance that does not change its chemical identity; examples include changing phase, dissolving into a solution, or breaking up into smaller pieces. |
| Physical Properties | Properties that describe matter, including color, feel, smell, boiling point, melting point, and density |
| Property | A physical or chemical characteristic of a substance or element |
| Pure Substance | A single substance, either an element or a compound, with definite composition and properties |
| Qualitative | Related to the description of something in nonnumerical terms |
| Quantitative | Related to the description of something in numerical terms |
| Solid | A state of matter where the shape is constant and rigid, where the volume is constant, and where the particles vibrate in a fixed position |
| Solution | A homogeneous mixture where the solute particles are separated at the molecular or atomic level |
| Sublimation | The process by which a sample of matter changes directly from the solid state to the gaseous state without going through the liquid state |
| Substances | Elements or compounds that can only be separated or combined to make substances with new properties by means of a chemical reaction |
| Suspension | A heterogeneous mixture that contains particles large enough to settle out and create a cloudy appearance |
| Tyndall Effect | The effect that occurs when light is scattered through a colloid, causing the light beam to become visible as it travels through the mixture |
| Vapor | The gaseous state of a sample of matter that would otherwise be a liquid or gas at room temperature |
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TheModernScienceTeacher
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