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Vocabulary Unit A
| Question | Answer |
|---|---|
| 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
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