| A | B |
|---|
| law of conservation of mass | law stating that mass can neither be create nor destoyed during any physical or chemical change |
| liquid | a phase of matter that has definite volume but no deginite shape |
| liter | the volume equal to o.1 of a meter cubed |
| manilpulating variable | the condition you change |
| mass | a measure of the amount of matter that makes up a solid, a liquid or a gas |
| matter | anything that has mass and volume |
| melting | the changing of a solid to a liquid |
| meter | one ten millionth of the distance from the north or south pole to the equator |
| mixture | two or more kinds of pure matter that are mixed and that can be separated by physical change |
| model (mental model) | uses imagination and reason to explain a series of observations or the behavior of things in nature |
| molecule | is made of two or more atoms chemically bonded together. the smallest particle of a compound that has all the properties of that compound |
| observations | anything we can perceive through out senses |
| operational definition | a definition that states how soemthing can be dtected or how it can be measures |
| particle model for matter | all matter is made up of tiny moving particles |
| physical change | a change in which no new or different kind of matter is formed |
| physical property | properties that can be observed and measured without changing the kind of matter being studied |
| plasma | form of matter found in the interior of stars |
| plus(+) | added to |
| prediction | an expected future event or observation |
| product | a new substance that forms when reactants are combined |
| property | a quality that describes or characterizies a substance |
| pure matter | made up of only one kind of matter with definite properties and is the same throughout |
| reactant | any material that when combined with one or more other materials produces one or more new materials |
| responding variable | the condition you are measuring |
| solid | a phase of matter that has a definite shape and volume |
| solute | the substance in a solution that is dissolved by finding spaces between the particles of the solvent |
| solution | a homogeneous mixture in which one substance is dissolved in another |
| solvent | the substance in a solution that does the dissolving |
| specific properties | properties that make one kind of matter different from other kinds og matter such as solor,size shape, texture and odor |
| sublimation | a ohase change inwhicvh a gas is formed directly from a solid and vice versa |
| subscript in a formula | tells how many atoms of an element are present inone molecule of a substance |
| suspension | a homogeneous mixture that eventually separates and settles out |
| symbol of an element | the hsorthand way of expressing the name of an element using one or two letters |
| vaporization | the phase change in which a liquid changes toa gas |
| variable | anything that can affect the outcome of an experiment |
| volume | a measure of the amount of space taken up by an object |
| water displacement method | to dissplace water in a container in order to 1) measure the volume of an irregularly shaped object or/2) collect a gas |
| weight | a measurement of the pull of gravity on the mass of an object |
