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Science Test 10/12
Question | Answer |
---|---|
What are the states of matter? | solid,liquid,gas,plasma,B.E.C |
What does B.E.C mean? | Bose-Einstein condensate |
Where you have ______, you have _____. | motion, energy |
Solid | has a fixed volume and shape |
Liquid | has a fixed volume but no fixed shape |
gas | has no fixed shape or volume |
plasma | state of matter in which atoms have been stripped of their electrons. ( a super heated gas)ex.sun,lightning |
B.E.C. | a new state of matter discovered at extremely low temp. (cold) |
______ have very ____ energy and can vibrate, but not a lot. | solids, little |
_____ has more engery than solids. | liquids. |
______ is the most unstructured. ___ amount of energy. Moves very fast. ____,______, and _____ can change it. | gas, huge, temp., volume and pressure |
changing the state of matter is a.... | physical change. |
Process: melting | solid to liquid |
melting point | lowest temp. at which a substance STARTS to melt. ( same temp as the freezing point) |
Process: freezing | liquid to solid |
freezing point | the temp. in which a substance BEGINS to become a solid. ( same temp as the melting point) |
Process: evaporation | liquid to gas |
boiling point | the temp. in which a substance begins to evaporate into a gas. |
process: condensation | gas to liquid |
sublimation | when a solid changes directly to a gas |
___ mass and ____ temp. makes atoms go faster. | less, hotter |
Boyle's law ( gas law ) for a fixed amount of gas, the ___ increases as its ______ decreases. | the relationship between volume and pressure. volume, pressure |
charles law ( gas Law ) for a fixed amount of gas, the volume _____, as the temp. ______. | relationship between temp. and pressure. increases, increases. (temp and volume are directly proportional!!) |
physical changes | a change in any physical property of a substance, not the substance itself. ex. stretching a rubberband |
chemical changes | a change of one substance into another substance. |
indications that a chemical change is happening | an odor, change in temp., change in color, precipitate forms, gas is present |