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unit 1.2
science
Term | Definition |
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atom | The smallest unit of element that maintains the properties of that element |
element | a substance that cannot be separated or broken down into a simpler substances by chemical means |
compound | a substance made up of atoms of two or more different elements that are joined by a chemical bond |
mixture | a combination of two or more substances that are not chemically combined |
pure substances | a sample of matter either a single element or single compound that has definite chemical and and physical properties |
heterogenous | 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 substances are fixed |
gas | a form of matter that does not have a definite shape or volume |
freezing | the change of state form a liquid to a solid |
melting | the change of state from solid to liquid |
evaporation | the changes of state from a liquid to a gas usually occurs at the surface of liquid over a wide range if temperatures |
boiling | the change of state from a liquid to gas that ocurrs at specific temperatures |
condensation | the change of state from a solid to a liquid |
sublimation | the change of state from a solid directly to a gas |
deposition | the change fo state form gas directly to a solid |
liquid | the state of matter that has a definite volume but not a definite shape |