physical science
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55 terms
Terms | Definitions |
|---|---|
 physical property | an aspect of matter that can be observed or measured without changing it, used to describe or define a object |
| density physical | the amout of mass per volume/ what kind of property is it |
| luster physical | how shiney or dull an object is/what kind of property is it |
| boiling point physical | the temp a liquid becomes a gas/what kind of property is it |
| melting point physical property | the temp a solid becomes a liquid/ what kind of preperty is it |
| texture physical | the type of surface of a material/what kind of property is it |
| color physical | the color of an object/what kind of property is it |
| hardness physical | how well a material withstands the application of force/what kind of property is it |
| ductility/malleability physical | being able to be stretched or compressed without breaking/what kind of property is it |
| chemical property | may be only observed by changing the chemical identity of a substance |
| flammability ph reactivity bonding type | name all 4 chemical propertys |
| density | the amount of mass "stuff" in an object mass diveded by volume g/m3 or g/l |
| 1.00 g/l | density of water |
| sinks | objects more dense then 1.00 |
| floats | objects less dense then 1.00 |
| ph scale | the scale used for measuring the acidity or alkalinity (base) of a substance |
| acid | 0-6 on ph scale |
| neutral | 7 on scale |
| base | 8-14 on scale |
| more acid | closer to 0 on scale |
| more basic | closer to 14 on scale |
| physical change | any change in an object that does not resolve in the production of a new substance |
| breaking cutting or crushing | 3 ex of physical change |
| phase change | a change in a state of matter |
| chemical change | substances are changed into different substances |
| new color chem change | leaves |
| energy is absorbed or realeased chem change | release of light, change in temp |
| odor changes chem change | spoiled food |
| reacts with oxyegen chem change | oxidizing or rust |
| production of solid or gas chem change | burning/bubbles |
| not easily reversible chem change | can you turn somke back into wood |
| solid | very low molecular vibration, low energy level, tightly packed, do not flow, takes shape of container |
| liquid | moderate amount of molecular vibration, moderate energy level,flows,takes shape of container,loosely bonded together |
| gasses | high amount of molecular vibration, high energy level,free moving (not bonded together), do not take shape of container |
| melting | solid to liquid |
| vaporization | liquid to gas |
| condensation | gas to liquid |
| freezing | liquid to solid |
| sublimation | solid to gas |
| deposition | gas to solid |
| heat | total amount of thermal energy, includes kinetic (molecular vibration) energy and the amount of molecules |
| temperature | average measure of kinetic energy in a system |
| iceburg cez more molecules | which has more heat iceburg or cuo of hot water and why? |
| up | at a phase change in a heat curve energy is being built____ |
| break | energy in a phase change in a heat curve is used to ______ the bonds |
| pure substance | matter that contains only 1 kind of particle,cannot be seperated by physical means |
| compound | 2 or more elements bounded together |
| mixture | matter that is made up of 2 or more pure substances, can be seperated by physical means |
| homogeneous mixture | mixture that is the"same" throughout, compleatly dissolve and has a uniform(same) composition |
| solution | made up of small particles, looks clear, nonfilterable, homo |
| solute | being dissolved |
| solvent | doing the dissolving |
| colloid | made up of large particles, looks milky, nonfilterable, homo |
| heterogeneous mixture | mixture that id "different" throughout. can be pulled apart and is not in uniform |
| suspension | visable particles, filterable hetero |
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