Vocabulary
A substance changes from one state of matter to another.
The energy related to the motion of particles is called what?
Thermal Energy
During freezing, do particles gain or lose thermal energy?
Lose thermal energy.
An ice cube sitting on a counter turns into liquid water. What phase change is this?
Melting
True or False: Condensation is when a gas turns into a liquid.
True.
Name the phase change when a solid becomes a liquid.
Melting
When particles gain thermal energy, do they move faster or slower?
Faster
Water boils at this temperature in degrees Fahrenheit. Write the number.
212°F
A water bottle is placed in a freezer and becomes solid ice. What phase change is this?
Freezing.
True or False: Evaporation happens only when a liquid reaches its boiling point.
False.
Name the phase change when a liquid becomes a gas at the surface.
Evaporation
During sublimination, do particles gain or lose energy?
Gain.
When a substance melts, does its particles gain or lose thermal energy?
Gain thermal energy.
A wet sidewalk dries after the sun comes out. What phase change is this?
Evaporation.
Give the name for liquid → solid.
Freezing
Name the phase change when a liquid changes to a gas throughout the liquid at 212°F.
Boiling
Fill in: When particles lose thermal energy, their movement becomes ____.
Slower
Explain in one sentence how particle speed and temperature are related.
Answers may vary.
Water droplets form on the outside of a cold glass. What phase change is this?
Condensation.
True or False: Sublimation is the phase change from gas to solid.
False.
This is when a solid changes directly into a gas without becoming a liquid.
Sublimation
Explain in one sentence what happens to particle motion when a substance melts.
Include: States of Matter, Speed of particles and Losing or Gaining thermal energy.
Answers may vary. Include: State of Matter, Speed of particles and Losing or Gaining thermal energy.
In one sentence, describe how adding thermal energy can change a solid into a liquid.
Answers may vary.
A science teacher shows a class dry ice it is solid but slowly becomes a gas without becoming a liquid. What phase change is this?
Sublimation.
Give the phase change that causes liquid to escape as a gas at a certain temperature.
Boiling.