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Unit 1 Lesson 1-6
Matter
| Term | Definition |
|---|---|
| Matter | Anything that has mass and takes up space |
| Mass | Amount of matter in an object |
| Weight | Measure of the gravitational force of an object |
| Volume | Amount of space an object takes up |
| Density | Measure of the amount of mass in a given volume |
| Physical Property | Characteristic of a substance that can be observed and measured without changing the identity of the substance |
| Chemical Property | Substances ability to change into a new substance with different properties |
| Physical Change | Change that effects 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 Conversation Matter | States that 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 | Pure substance is a substance that has definite physical and chemical properties such as appearance, melting point, and reactivity |
| Heterogeneous | Mixture is one that does not have a uniform compsition |
| Homogeneous | Substances are spread |
| Solid | Substance that has a definite volume and shape |
| Liquid | Definite volume but not shape |
| Gas | No definite volume or shape |
| Freezing | When a liquid becomes solid |
| Melting | Solid to a liquid |
| Evaporating | Liquid to gas |
| Boiling | Liquid to gas rapidly |
| Condensation | Gas to liquid |
| Sublimation | Solid directly to a gas |
| Deposition | Change in state from a gas directly to a solid |