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Vocabulary Unit A

evidence observations or data to support a statement, hypothesis, or point of view
hazardous materials substances that can pose a danger to the health & safety of living things
mixture a blending of two or more substances without chemical bonding or other chemical change, a combination of two or more pure substances that can be physically separated
corrosive a substance that may dissolve metals, ruin clothing, or burn skin. Strong acids and bases are corrosive.
flammable easily ignitable and capable of burning rapidly. Can serve as a fuel for a fire.
toxic materials that are poisonous if inhaled, ingested, or absorbed through the skin
observation notes taken that provide evidence using 5 senses
inference a conclusion based on observations or what is already or known
chemical property A specific result of a test with a chemical reagent. Examples include pH, the production of a salt when an acid reacts with a metal, or a color change in a chemical reaction
physical property A characteristic of a substance or material, such as color, density, flexibility, hardness. These properties help identify pure substances and do not depend on the size or amount of the substance.
miscible Two or more substances that can be mixed together in any ratio to form a single phase without separation.
density The relationship between the mass and volume of a substance.  Density equals mass divided by volume. (d = m/v)
reactivity the tendency of a substance to undergo a chemical reaction, either by itself or with other materials
conductivity A measure of the tendency of an object to support the flow of heat or electricity
metric system The measuring system used by scientists and most countries other than the United States and United Kingdom
volume The amount of space that an object or substance occupies
water displacement The amount of water that is moved (displaced). This determines the volume of the object that caused the water to be moved.
mass is the amount of matter in an object
weight is a measurement of a gravitational force between two objects
qualitative description, observation, or analysis of a substance based on its qualities
quantitative description, observation, or analysis of a substance based on measurements
Created by: Sue Fredin