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chpt9 lesson 3
vocab+facts
Question | Answer |
---|---|
temperature | a measurment of how hot or cold something is |
sublimation | occurs when a substance changes directly from a solid to a gas without going through a liquid state |
melting point | the temperature at which the solid melts to become a liquid |
freezing point | the temperature at which a liquid freezes |
boiling point | the temperature at which a liquid becomes a gas |
vaporization | the process by which a liquid changes to a gas |
pressure | the force exerted by the gas |
physical change | altering the size,shape, or state of a substance without forming a new substance |
matter can exist as a _________, ____________, or _______. | solid, liquid, gas |
The ________ of a gas is affected by temperature and pressure | volume |
Ice cubes left in your freezer for a long period of time will become _______ and eventually "____________". | smaller;disappear |
During evaporation what happens? | the water molecules absorb energy. |
The molecules do what, during evaporation? | They move faster and farther apart and escape from the liquid. |
After the molecules separate during evaporation what happens next? | The water vapor condenses into liquid water and energy is released. |
What happens when energy is removed during evaporation? | The molecules slow down and move closer together to become a liquid again. |
If you put a balloon in cold water what happens? | it shrinks |