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Unit 1 book 3
lessons 1-6
| Term | Definition |
|---|---|
| matter | anything that has mass and takes up space |
| mass | the amount of matter in an object |
| weight | a measure of the gravitational force |
| volume | the amount of space that an object takes up, or occupies |
| density | a measure of the amount of mass in a given volume |
| physical property | a characteristic of a substance that can be observed and measured without changing the identity of the substance |
| chemical property | a substance's ability to change into a new substance with different properties. |
| physical change | a change that affects one or more physical properties of a substance |
| chemical change | occurs when one or more substances change into entirely new substances with different properties |
| law of conservation of mass | states that in ordinary chemical and physical changes. |
| atom | the smallest unit if an element that maintains the properties of that element. |
| element | is made up of one or more of the same kind of atom chemically combined. |
| compound | made up of different kinds of atoms chemically combined. |
| mixture | a variety if elements and compounds that are not chemically combined with each other. |
| pure substances | a sample of matter, either a single element or a single compound, that has definite chemical and physical properties. |
| heterogeneous | describes something that has a uniform structure or composition throughout. |
| homogeneous | describes something that has a uniform structure or composition throughout. |
| solid | a substance that has a definite volume and shape. |
| liquid | a substance that has a definite volume but not a definite shape. |
| freezing | the change of state in which a liquid becomes a solid. |
| melting | the change of state from a solid to a liquid. |
| evaporation | particles gain enough energy that they escape from the surface of the liquid and become a gas. |
| boiling | a rapid change from a liquid to a gas, or vapor |
| condensation | the change of state from a gas to a liquid |
| sublimation | the change from a solid state directly into a gas. |
| deposition | the change in state from a gas directly to a solid. |
Created by:
madness25
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