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matter anything that has mass and takes up space
mass describes the amount of matter in an object
weight a measure if the gravitational force of an object
volume the amount of space an object takes up
density a measure if the amount of mass in a given volume
physical property a characteristic of a substance that can be observed and measured without changing the identity of the substance
chemical property substances ability to change into a new substance with different properties.
physical change a change that affects one or more physical properties of a substance
chemical change when one or more substances change into entirely new substances wit different properties
law of conservation of mass that in ordinary chemical and physical changes mass is not created or destroyed but is only transformed into different substances.
atoms the smallest unit of an element that maintains the properties of that element
element made up of one or more of the same kind of atom chemically combined
compound made up of different kinds of atoms chemically combined
mixture a variety of elements and compounds that are not chemically combined with each other.
pure substaances a substance that has a definite physical and chemical properties such as appearance, melting point, and re activity.
hetrogeneus one that does not have a uniform composition
homogenous dissolves
solid definite volume and shape particles are close together and do not move freely
liquid definite volume but not definite shape particles have more kinetic energy than particles in a solid particles are attracted to each other and close together
gas does not have a definite volume or shape most kinetic energy particles are not close together and can move freely
freezing liquid becomes a solid
melting solid becomes a liquid
evaporation some particles gain enough energy that they escape from the surface of the liquid and become gas
boiling a rapid change from a liquid to a gas or a vapor
condensation the change of state from a gas to a liquid
sublimation the change from a solid state directly into a gas
deposition the change in state from a gas directly to a solid
Created by: 18hickse0606