click below
click below
Normal Size Small Size show me how
Tolli/Stapp 1
Solids, Liquids, and Gases 6.6 A
Term | Definition |
---|---|
solid | the state of matter that keeps its shape and will not yield to pressure |
liquid | the state of matter that has no fixed shape but has a fixed volume |
gas | the state of matter that has no fixed shape or volume; it can expand to fill a container |
freezing point | the temperature below which a liquid changes state to become a solid |
melting point | the temperature above which a solid changes state to become a liquid |
boiling point | the temperature above which a liquid boils (becomes a gas) at sea level |
states of matter | one of the distinct forms in which matter can exist |
four | the number of states of matter that are observable in everyday life |
plasma | the state of matter that is superheated, ionized gas (found in lightning and in stars like our sun) |
changes of state | the physical process that causes matter to change form from one state to another |
melting | the process of changing state from solid to liquid |
freezing | the process of changing state from liquid to solid |
boiling, evaporation | the process of changing from liquid to gas |
vaporization | the process of turning to vapor |
boiling | the process of the entire substance turning to vapor because of added heat energy |
evaporation | the process of the surface of the substance turning to vapor because of added heat energy |
condensation | the process of changing state from gas to liquid |
sublimation | the process of changing state from solid straight to gas, skipping the liquid phase |
heating | causes atoms and molecules to move more and expand |
cooling | causes atoms and molecules to move less and contract |