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Chapter 1 - 2014-15

Section 1, 2, and 3

TermDefinition
physical change any change that alters the form, appearance, or state of matter but does NOT produce a new substance
chemical change a change in matter that produces one or more new substances
law of conservation of mass states that matter can not be created or destroyed in any physical or chemical change
energy ability to do work or cause change
temperature measure of the average energy or random motion in particles of matter
thermal energy total energy of all particles in an object
endothermic change energy is taken in or absorbed from surrounding environment
exothermic change energy is taken out or released into surrounding environment
weight a measure of the force of gravity on an object
mass a measure of matter in an object measured in grams (g)
volume amount of space that matter occupies measured in liters (L), milliliters (mL), or cubic centimeters (cm3)
density relates mass of an object in a given volume measured in grams per cubic centimeter (g/cm3)
matter anything that has mass and takes up space
chemistry study of properties of matter and how matter changes
substance a single type of matter that is pure
physical property a characteristic of a pure substance that can be observed without changing it into another substance
chemical property a characteristic of a pure substance that describes its ability to change into new substances
element pure substance that can not be broken down into any other substances
atom basic particle from which all elements are made
chemical bond a force of attraction between two atoms
molecule a group of two or more atoms held together by a chemical bond
compound a pure substance made from two or more elements chemically combined in a set ratio
chemical formula shows elements in a compound and the ratio of atoms
mixture made of two or more substances that are together in the same place but not chemically combined
heterogeneous mixture a mixture in which you can see the separate parts
homogeneous mixture a mixture so evenly mixed that you can not see the different parts
Created by: cuddlycas
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