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 the element. |
element | a substance that cannot be separated or broken down into simpler substance by chemical means. |
compound | a substance made up of atoms of two or more different elements joined by chemical bonds. |
mixture | a combination of two or more substance 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. |
heterogeneous | describes something that does not have a uniform structure or composition throughout. |
homogeneous | describes something that has a uniform structure or composition throughout. |
solid | The state of matter in which the volume and shape of a substance are fixed. |
liquid | the state of matter that has a definite shape. |
gas | a form of 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 temperaturas. |
boiling | the change of state from a liquid to a gas that occurs at a specific temperature. |
condensation | the change of state from gas to liquid. |
sublimation | the change of state from a solid directly to a gas. |
deposition | the change of the state from a gas directly to a solid. |