click below
click below
Normal Size Small Size show me how
matter
chemical and physical properties and changes
Term | Definition |
---|---|
mass | The amount of matter in an object |
compound | 2 or more substances that are chemically combined ex. water |
pure substance | Category of matter that is either an element or a compound |
volume | The amount of space an object or substance takes up |
element | simple pure substance that cannot be changed into a simpler substance ex. oxygen |
density | \The amount of mass in a specific volume |
exothermic reaction | loses or releases heat energy; resulting in a heating of the environment and cooling of the substance |
mixture | 2 or more substances not chemically combined |
endothermic reaction | absorbs heat energy; resulting in cooling of the environment and heating of the substance |
compound | 2 or more elements that are chemically combined ex. water. 2 or more types of atoms |
Chemical change | A process in which one or more substances are altered into one or more new and different substances, a reaction involving the rearrangement of atoms |
Physical change | A usually reversible change in the properties of a substance. The appearance of the substance changes but its identity does not |