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Chapter 15 Vocab
Term | Definition |
---|---|
Chemical Change | change of one substance into a new substance |
Chemical Property | any characteristics of a substance, such as flammability, that indicates whether it can undergo a certain chemical change |
Colloid | heterogeneous mixture whose particles never settle |
Compound | substance formed from two or more elements in which the exact combination and proportion of elements is always the same |
Distillation | process that can separate two substances in a mixture by evaporating a liquid and recondensing its vapor |
Element | substance with atoms that are all alike |
Heterogeneous Mixture | mixture, such as mixed nuts or a dry soup mix, in which different materials are unevenly distributed and are easily identified |
Homogeneous Mixture | solid, liquid, or gas that contains two or more substances blended evenly throughout |
Law of Conservation of Mass | states that the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change |
Physical Change | any change in size, shape, or state of matter in which the identity of the substance remains the same |
Physical Property | any characteristics of a material, such as size or shape, that you can observe or attempt to observe without changing the identity of the material |
Solution | homogeneous mixture that remains constantly and uniformly mixed and has particles that are so small that cannot be seen with a microscope |
Substance | element or compound that cannot be broken down into simpler components and maintain the properties of the original substance |
Suspension | heterogeneous mixture containing a liquid in which visible particles settle |
Tyndall Effect | scattering of a light beam as it passes through a colloid |