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Matter
| Question | Answer |
|---|---|
| define matter | Anything that has volume and mass. |
| define volume | Amount of space something takes up. |
| define mass | Amount of matter an object has. it remains constant. (as long as the matter remains constant) |
| define weight | Gravitational force on an object. It changes depend on its location relative to the earth. |
| 1. What is physical property ? 2. What are some examples? | -Can be measured or observed without changing the identity of the object. -color,size,shape |
| what is conductivity? | transfer of energy |
| what is malleability?? | when something is pounded into thin sheets |
| define ductility | pulled into thin wire |
| solubility | dissolve into another substance |
| define density | mass per unit d=m/v |
| what is chemical propety | describe a substance based on its ability to change into a new substance with different properties |
| what are some chemical properties? | flammability reactivity |
| what is physical change? | changing a physical property of a substance. It does not change the identity of the substance. |
| define chemical change | process of changing a substance into a new substance. ex. tarnishing,burning, and souring |
| what is solid? | Molecules are very close together. Solids have a definite shape and volume. |
| define crystalline | orderly arrangement of molecules ; repeating ex. ice,diamond,and iron |
| what order are amorphous molecules in? | no particular order ex. rubber,wax, and plastic |
| what order are liquid molecules in? | somewhat close together; changes shape but not volume ; molecules slide past one another to conform to container. |
| what order are gas molecules in? | far apart; changes both shape and volume; |
| what is boyles law? | for fixed amount of gas at a, the volume of a gas increases as its pressure decreases; volume decreases as its pressure increases .....ex.pump |
| what is charles law? | for a fixed amount of gas at constant pressure the volume of a gas increases as the temperature increases; the volume of a gas decreases as its temperature decreases....ex. car tire |
| what is plasma? | no definite shape or volume;molecules have broken apart; conducts electrical currents; ex. lightning,fire, auroras borealis |
| what is change of state? | conversion of a substance from one physical form to another; |
| what is melting point? | solid changes to liquid and molecules gain energy and move faster. endothermic energy is absorbed. |
| what is freezing? | liquid changes to a solid and molecules lose energy. Exothermic change- energy is removed. |
| give ex. of vaporization | boiling(liquid to gas at boiling point), evaporation(liquid to gas below the boiling point).....endothermic charge-energy is absorbed |
| what is condensation? | gas changes to liquid molecules lose energy exothermic change- energy is removed |
| define sublimation | solid changes to gas |
| what is the density of h20? | 1.0 g/cm3 |
| what happens if object is less dense | it floats |
| what happens if object is dense | it will sink |
Created by:
tylerusso
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