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Chapters 2
Introduction to Matter
| Question | Answer |
|---|---|
| matter | anything that has mass and takes up space |
| chemistry | the study of the properties of matter and how matter changes |
| substance | a single kind of matter that is pure, it always has a specific makeup |
| physical property | a characteristic of a pure substance that can be observed without changing it to 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 simpler substance by chemical of physical means |
| atom | the basic particle from which all elements are made |
| chemical bond | a force of attraction between two atoms |
| molecule | formed when atoms combine to make larger particles |
| compound | a pure substance made of two or more elements chemically combined in a set ratio |
| chemical formula | shows the elements in the compound and the ratio of atoms |
| mixture | made of two or more substances that are together in the same place but are not chemically combined |
| heterogeneous mixture | a mixture in which you can see the different parts |
| homogeneous mixture | so evenly mixed that you can’t see the different parts |
| solution | made up of a solute and a solvent |
| weight | a measure of the force of gravity on an object |
| mass | the measurement of the amount of matter in an object |
| International System of Units | a universal system of metric units |
| volume | the amount of space that matter occupies |
| density | relates to the amount of mass of a material in a given volume |
| physical change | any change that alters the form or appearance of matter but does not create a new substance |
| chemical change | a change in matter that produces one or more new substances |
| law of conservation of mass | the fact that matter is neither created nor destroyed in any chemical or physical change |
| energy | the ability to do work or cause change |
| temperature | a measure of the average energy of random motion of particles of matter |
| thermal energy | the total energy of all the particles in an object |
| endothermic energy | a change in which energy is taken in |
| exothermic energy | reaction that releases energy |
| kinetic energy | the energy of matter in motion |
| potential energy | stored energy an object has because of its position |
| chemical energy | the internal energy stored in the chemical bonds between atoms |
| electromagnetic energy | a form of energy that travels through space as waves |
| electrical energy | the energy of electrically charged particles moving from one place to another |
| electrode | two metal strips attached to wires that are placed inside a solution as part of the electrolysis process |
Created by:
KerriReynolds
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