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Word Substance Element Compound Heterogeneous mixture Definition and Example Type of matter with a fixed composition; can be element or compound Ex: He, water, salt Substance made up of atoms that are all alike Ex: graphite in pencil point Substance in which the atoms of 2 or more elements are chemically combined in a fixed proportion Ex: water Mixture in which different materials remain distinct Ex: Salad, oil and vinegar dressing Suspension A heterogeneous mixture made of a liquid and solid particles that settle Ex: River deltas, seasoning in salad dressing Colloid A heterogeneous mixture with particles that never settle Ex: milk (water, fats, proteins), fog (liquid suspended in air) Tyndall effect Scattering of light as it passes through a colloid Key 1: Understand and can explain 2: Understand, but can't explain 3: Fuzzy 4: Don't know Before After After After Reading Reading Discussion Experiment or Observation '~' , .•." ~' ". t ';' ••• ,"~ :E''''~, t, ''\ ,~ Word Definition and Example Homogeneous mixture A mixture that remains constantly and uniformly mixed and has particles that are so small that they cannot be seen with a microscope Ex: soft drink in sealed bottle Solution Same thing as a homogeneous mixture Ex: tea, vinegar, brass steel alloys Physical property Any characteristic that you can observe without changing the identity of a substance Ex: color, shape, size, density Physical change A change in size, shape, or state of matter in which the identity of the substance remains the same Ex: can change states; color Distillation Chemical property Process of separating substances in a mixture by evaporating a liquid and recondensing its vapor Ex: separate 2 liquids with different boiling points Any characteristic of a material that you can observe that produces one or more new substances Ex: flammability Key 1: Understand and can explain 2: Understand, but can't explain 3: Fuzzy 4: Don't know Before After After After Reading Reading Discussion Experiment or Observation ._. .- Word Chemical change Law of Conservation of Mass Definition and Example A change of one substance to another Ex: baking soda and vinegar total mass of the reactants = total mass of the products Key 1: Understand and can explain 2: Understand, but can't explain 3: Fuzzy 4: Don't know Before After After After Reading Reading Discussion Experiment or Observation