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29 terms
Terms | Definitions |
|---|---|
 matter | anything that has mass and takes up space |
| graduated cylinder | used to measure the volume of a liquid |
| mass | measures the amount of matter within an object - does not depend on gravity |
| volume | the amount of space an object occupies |
| weight | is affected by the amount of gravity pushing down on an object |
| Volume of a regular shaped object | = length x width x height |
| Volume of an irregular shaped object | displacement = v2 - v1 |
| Conservation of Matter | a change can occur in a substance either physically or chemically but mass can neither be created or destroyed |
| Density | Mass / Volume |
| Density of a substance | is constant no matter how much or little you have of that same substance |
| Density of H2O | Liquid = 1 g/mL Solid = 0.91 g/mL Gas = 0.0006 g/mL |
| Atom | the basic unit of matter |
| Compound | when two or more different atoms bond together |
| Molecule | when two or more atoms bond together, it doesn't matter if they are the same or different |
| Solid | molecules close together and vibrate |
| Liquid | molecules have some space between and slide |
| Gas | molecules have a lot of space between and flow |
| Molecules Heated | speed up |
| Molecules Cooled | slow down |
| Physical property | can be changed without changing the actual substance |
| Chemical property | is what is changed to turn one substance in a brand new substance |
| Evaporation | liquid to a gas |
| Condensation | gas to a liquid |
| Freezing | liquid to a solid |
| Melting | solid to a liquid |
| Sublimation | gas to a solid or a solid to a gas |
| Proton | positive charge found in the nucleus = Atomic # |
| Electron | negative charge found in the electron cloud = Atomic # |
| Neutron | neutral charge found in the nucleus = Atomic Mass - Atomic # |
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