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Unit 1.2
Science
Term | Definition |
---|---|
Atom | The smallest unit of an element that maintain the properties of that element. |
Pure Substance | a sample of matter either a single element or a single compound that has definite chemical and physical properties |
Element | A substance that cannot be separated or broken down into simpler substances by chemical means. |
Heterogeneous | Describe something that does not have a uniform structure or composition throughout. |
Compound | A substance made up of atom of two or more different elements joined by chemical bond. |
Homogeneous | Describe something that has uniform structure or composition throughout. |
Mixture | A combination of two or more substance that are not chemically combined. |
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 volume but not a definite shape. |
Gas | A form of matter does not have a definite volume or shape. |
Freezing | The change of state from liquid to solid. |
Condensation | The change of state from gas to liquid. |
Melting | The change of state from a solid to a liquid |
Sublimation | The change of state from directly toa gas. |
Evaporation | The change of state from liquid to a gas that usually occurs that the surface of a liquid over a wide rang of temperatures. |
Deposition | The change of state from a gas directly to a solid. |
Boiling | The change of state to liquid to gas that occurs at a specific temperature. |