Term | Definition |
Element | A substance that that cannot be broken down into other substances by physical or chemical means |
Chemical Bond | Two atoms attracted to eachother |
Molecule | A group of more than 1 atoms held together by chemical bonds |
Compound | A Substance made of more than 1 elements that are chemically combined in a set ratio |
Chemical Formula | Shows the elements in the compound and the ratio of atoms |
Mixture | Made of more than 1 susbtances that are together in the same place but are not chemically bonded |
Matter | anything that takes up space and has mass |
Chemistry | the study of how matter changes and matter |
Susbtance | a single kind of matter that is pure |
Physical Property | A characteristic of a substance that can be observed without changing it. |
Chemical Property | A characteristic of a substance that describes its ability to change. |
Weight | A measure of the force of gravity |
Mass | The amount of matter in an object |
International System of Units | Measurements for the properties of Matter |
Volume | The amount of space that matter ocupies |
Density | A measurement of mass of a given volume |
Physical Change | Alters the appearance of matter but does not turn any substance in the matter into something else |
Chemical Change | A change in mater that produces more substances |
Law of Conservation of Mass | Matter is not created nor destroyed in any chemical or physical change |
Temperature | the measurement of heat or cold |
Thermal Energy | total energy of the motion of all of the particles in an object |
Endothermic Change | A change were energy is absorbed |
Exothermic Change | The act of releasing energy |
Chemical Energy | The type of energy that is stored in chemical bonds between atoms |