click below
click below
Normal Size Small Size show me how
Matter and energy
Term | Definition |
---|---|
matter | is anything that has mass and takes up space |
mass | describes the amount of matter in an object |
weight | is a measure of the gravitational force |
volume | objects with the similar volumes do not always have the same mass |
density | is a measure of the amount of mass in a given volume |
physical property | observe a measure without changing the identity of the substance |
chemical property | describes a substance ability to change into a new substance with different properties |
physical change | is a change that affects one or more physical properties |
chemical change | occurs when one or more substance change into entirely new substances with different properties |
law of conservation of mass | states that in ordinary chemical and physical changes |
atoms | are the smallest unit of element that maintains the property of that element |
element | is made up of one or morre of the same kind of atom chemically combined |
compound | is made up of different kinds of atoms chemically combined |
mixture | contains a variety of elements and compounds that are not chemically combined with eachother |
pure substance | a sample of matter either a single element or a single compund. |
heterogeneous | mixture is one that does not have a uniform composition |
homogenous | describes something with a uniform structure |
solid | substance that has a volume and shape |
liquid | substance has a definite volume but not a definite shape |
gas | does not have a definite shape or volume |
freezing | the change in which a liquid becomes a solid |
melting | the change of state from a solid to a liquid |
evaporation | occurs slowly at a range of temperatures |
boiling | A rapid change from a liquid to gas |
condensation | is the reverse of evaporation |
sublimation | the change from a solid to a gas |
deposition | is the change in state from a gas directly to a solid |