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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 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 substances that are not chemically combined |
pure substance | a sample of matter either a single element or 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 shaped of a substance are fixed |
liquid | the state of matter that has a definite volume but not a definite shape |
gas | a form pf matter that does not have a definite volume or shape |
freezing | a change in state from a liquid to a solid |
melting | a change in 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 temperature |
boiling | the change of state from a liquid to a gas that occurs at a specific temperautre |
condensation | the change in a state from a gas to a liquid |
sublimation | the change of state from a solid directly to a gas |
deposition | the change of state from a gas directly to a solid |