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Unit 1: Matter
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 on an object |
| Volume | The amount of space that an object 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 subtance |
| Chemical Change | When one or more substances change into entirely new substances with different properties |
| Law of Conservation of mass | In ordinary chemical and physical changes, mass is not created or destroyed but is only transformed into different substances |
| Atom | 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 | A substance that has definite physical and chemical properties such as appearance, melting point, and reactivity |
| Heterogeneous | A mixture that does not have a uniform composition |
| Homegeneous | Describes something that has a uniform structure or composition throughout |
| Solid | A substance with a definite volume and shape |
| Liquid | A substance with a definite volume but not a definite shape |
| Gas | A substance without a definite volume or shape |
| Freezing | The change in state in which a liquid becomes a solid |
| Melting | A change of state from a solid to a liquid |
| Evaporation | When 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 | A change of state from a gas to a liquid (reverse evaporation) |
| Sublimation | The change in state from a solid state directly into a gas |
| Deposition | The change in state from a gas directly to a solid |
Created by:
18Fontek0105
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