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matter and energy
| Term | Definition |
|---|---|
| matter | anything that has mass and takes up space. |
| mass | describes 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 given volume. |
| physical property | a characteristic of a substance that can be observed and measured without changing the identity of the substance. |
| chemical property | describes 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 charges, mass is not created or destroyed but is only transformed into different substances. |
| atom | are the smallest unit of an element that maintains the properties of that element. |
| element | 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 | contains a variety of elements and compounds that are not chemically combined with each other. |
| pure substance | elements and compounds |
| heterogeneous | mixture is one that does not have a uniform composition |
| homogeneous | mixture |
| solid | substance has a definite volume and shape |
| liquid | substance has a definite volume but not a definite shape |
| gas | does not have a definite volume or shape |
| freezing | the change in state in which liquid becomes a solid. |
| melting | this change of state from solid to a liquid. |
| evaporating | some particles gain enough energy that they escape from the surface of the liquid to a gas. |
| boiling | a rapid change from a liquid to a gas, or vapor. |
| condensation | this change of state from a gas to a liquid. |
| sublimation | the change from a solid state directly into a gas. |
| deposition | is the change in state from a gas directly to a solid. |
Created by:
18tgal0513
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