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unit one

TermDefinition
absolute zero temperature at which molecular energy is at a minimum (0K)
atom smallest unit of an element that maintains the chemical properties of that element
boiling point temperature and pressure when a liquid becomes a gas
buoyant force the upward forces that keeps an object immersed in or floating on a fluid
chemical change a change that occurs when one or more substances changes into entirely new substances with different properties
colloid mixture consisting of tiny particles that are intermediate in size between those in solutions and those in suspensions and that are suspended in a liquid, solid or gas
compound substance made up of atoms of two or more different elements joined by chemical bonds
condensation change in state from a gas to a liquid
conduction transfer of energy as heat through a material
convection movement of matter due to differences in density that are caused by temperature variations
density ratio of the mass of a substance to the volume of a substance commonly expressed as grams per cubic centimeter for solids and liquids and grams per liter for gases
element a substance that cannot be separated or broken down into simpler substances by chemical means
emulsion any mixture of two or more immiscible liquids in which one liquid is dispersed in the other liquid
energy capacity to do work
evaporation the change of state from a liquid to a gas
fluid a nonsolid state of matter in which the atoms or molecules are free to move past each other
gas laws the laws that state the mathematical relationships between volume, temperature, pressure and quantity of a gas
heat energy transferred between objects that are at different temperatures
matter anything that has mass and takes up space
melting point temperature and pressure at which a solid becomes a liquid
mixture combination of two or more substances that are not chemically combined
molecule group of atoms that are held together by chemical forces
pascal the SI unit of pressure
physical change a change of matter from one form to another without a change in its chemical properties
plasma state of matter that consists of free moving ions and electrons
pressure the amount of force exerted per unit area of a surface
pure substance sample of matter either a single element or single compound that has definite chemical and physical properties
radiation energy that is transferred as electromagnetic waves
reactivity capacity of a substance to combine chemically with another substance
solute in a solution, the substance that dissolves in the solvent
solution homogenous mixture throughout which two or more substances are uniformly dispersed
solvent in a solution, the substance in which a solute dissolves
sublimation process in which a solid changes directly to a gas
suspension mixture in which particles of a material are more or less evenly dispersed throughout a liquid or gas
temperature a measure of how hot (or cold) something is
thermal energy the total kinetic energy of substances atoms
thermometer an instrument that measures and indicates temperature
viscosity the resistance of a gas or liquid to flow
Created by: lisagardiner
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