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science vocab ch.2

study vocal

matter anything that has mass
substance a single kind of matter that is pure
physical property a characteristic of a pure substance
chemical property a characteristic of a pure substance , that can be broken down
element a pure substance that cannot be broken down
atom is the basic particle from which elements are made
chemical bond is the force of attraction from which elements are made
molucules groups of two or more atoms held together by chemical bond
compound a pure substance of two or more substances
chemical formula it shows the elements in the compound and the ratio of atoms
mixture is made of two or more substance , element , compounds or both
hetrogenious mixture you can see the different parts
homogenous mixture are so evenly mixed that you can’t see the different parts
solution an example of homogenous mixture
physical change any change that alters the form or appearance of matter but does not make any new substances
chemical change a change in matter that produces one or more new substances
law of conversations the fact that matter is not created or destroyed in any chemical or physical change
energy is the ability to do work or cause change
tempature is a measure of average energy of random motion of particles
thermal energy is the total energy of particle in an object
endothermic change a change in which energy is taken
exothermic change releases energy
Created by: dgoose2001