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Physical Science

Unit One, Chapter One 2015

QuestionAnswer
Matter Anything that has mass and takes up space
Chemistry Study of the properties of matter and how matter changes
Substance Single kind of matter, that is pure, and has a specific set of properties
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 different substances
Element A pure substance that cannot be broken down into any other substances
Atom The basic particle from which all elements are made
Chemical Bond A force of attraction between two atoms
Molecule Groups of two or more atoms held together by chemical bonds
Compound Pure substance made of two or more elements chemically combined in a set ratio
Chemical Formula The elements in a compound and the ratio of atoms
Mixture Made of two or more substances
Heterogeneous Mixture You can see the different parts in the mixture
Homogeneous Mixture Mixed evenly, so you cannot see the different parts of the mixture
Solution An example of a homogeneous mixture
Physical Change Any change that alters the form or appearance of matter, but does not make any substance in the matter into a different substance
Chemical Change A change in matter that produces one or more new substances
Law of Conservation of Mass Matter is neither created nor destroyed in any chemical or physical change
Energy The ability to do work
Temperature Measure of the average energy of random motion of particles of matter
Thermal Energy Total energy of all of the particles in an object
Endothermic Change A change in which energy is taken in
Exothermic Change A change that releases energy
Pressure The force of its outward push divided by the area of the walls of the container (Pascals)
Boyle's Law Pressure of gas, at a constant temperature, increases, the volume decreases. When the pressure of the gas decreases, at a constant temperature, the volume of the container increases
Charles' Law At a constant pressure, when the temperature of a gas increases, the volume increases, When the temperature of a gas decreases, at a constant pressure, the volume decreases.
Created by: ljoshi