click below
click below
Normal Size Small Size show me how
Unit 1.2
science
Term | Definition |
---|---|
atom | the smallest unit of an element that maintains the properties of that element |
element | a substance that cannot be separated or broken down into simpler substances by chemical needs |
compound | a substance made up of atoms of two or more different elements joined by chemical bonds |
mixture | a combination of two or more substances that are not chemically combined |
pure substance | a sample of matter, either a single element or a single compound , that has definite chemical and physical properties. |
heterogenous | describes something that does not have a uniform structure or composition throughout |
homogenous | describes something that does not have a uniform or composition throughout |
solid | The state of matter in which the shape of a substance are fixed |
liquid | the state of matter that has a definite volume but not a definite shape |
gas | a form or matter that does not have a definite volume or shape |
freezing | the change of state from a liquid to a solid |
melting | the change of state from a solid to a liquid |
evaporation | the change of state from a liquid to a gas that usually occurs at the surface of a liquid over a wide range of temperatures |
boiling | the change of state from a liquid to a gas that occurs at a specific temperature |
condensation | the change of state from a gas to a liquid |
sublimation | the change of state from a solid to directly to a gas |
deposition | the change of state from a gas to a solid |