| A | B |
|---|
| solid | definite shape and mass, molecules vibrate and tightly packed |
| liquid | definite volume; takes shape of container;molecules glide over each other |
| gas | no difinite shape or volume; molecules bounce off each other |
| plasma | state of matter found on sun and in lightning |
| melting point | temperature which substance changes from solid to liquid |
| boiling point | temperature which a substance changes from liquid to gas |
| condensation point | temp. which substance changes from gas to liquid |
| boiling point is the same as the ____ | condensation point |
| freezing point | temp. which substance changes from liquid to solid |
| melting point is the same as the ____ | freezing point |
| physical property | properties that describe the appearance of a substance (observations) |
| chemical property | properties that describe the way in which a substance reacts with another |
| evaporation | liquid goes into gas form at temp below boiling |
| condensation | change from gas to liquid |
| an example of condensation is | water vapor to water (water dropslets forming on glass of iced tea) |
| freezing | change from liquid to solid |
| example of freezing | water to ice |
| example of melting | ice to water |
| melting | change from solid to liquid |
| boiling | bubbles from within liquid that is heated |
| example of boiling | water to steam |
| sublimation | change from solid to gas OR gas to solid without going through liquid phase |
| example of sublimation | dry ice |
| density | amount of matter packed into given volume of substance |
| g/cc or g/cm3 | units for density |
| mass | amount of matter an object is made up of |
| volume | amount of space that an object takes up |
| matter | anything that has mass and takes up space |
| homogeneous | the same throughout |
| meterogeneous | not the same throughout |
| mixture | physical combination of 2 or more substances |
| example of a mixture | peanuts and raisins |
| solution | type of mixture in which substances are spread evenly throughout |
| examples of a solution | sugar & water; soda; antifreeze; tea/coffee |
| colloid | suspension where particles don't settle out and can't be seen |
| examples of homogeneous | water, whipped cream |
| examples of heterogeneous | cookie dough ice cream; twigs and rocks |
| example of a colloid | milk |
| universal solvent | water |
| solute | substance that dissolves in another substance |
| example of a solute | the SUGAR dissolving in water |
| solvent | the substance that does the dissolving (water) |
| dissolve | to "disappear" |
| emulsion | type of suspension with 2 or more liquids that don't mix |
| example of an emulsion | oil and water |
| chemical change | any change in matter that forms a NEW SUBSTANCE with NEW PROPERTIES |
| physical change | any change that DOESN'T create new substance-includes a change in state |
| example of physical change | glass breaking; ice cube melting |
| solubility | mass of a material in grams that will dissolve in 100 mL of water at a certain temperature |
| soluble | able to be dissolved |
| insoluble | not able to be dissolved |
| phase change | when matter changes states (solid-liquid-gas) |
| what is needed for a phase change | thermal energy |
| freezing point of water in degrees celsius | 0 degrees |
| freezing point of water in degrees farenheit | 32 degrees |
| boiling point of water in degrees celsius | 100 degrees |
| boiling point of water in degrees farenheit | 212 degrees |
