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Chapter 3 Lesson 6 . Changes of States. Vocabulary Words . Melting Melting point Freezing Vaporization Evaporation Boiling Boiling point Condensation Sublimation . What happens to the particles of a solid as it melts? .
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Chapter 3 Lesson 6 Changes of States
Vocabulary Words • Melting • Melting point • Freezing • Vaporization • Evaporation • Boiling • Boiling point • Condensation • Sublimation
What happens to the particles of a solid as it melts? • The change in state from a solid to a liquid is called ___________. • Most pure substances have a specific temperature at which this happens, called the ___________. At its melting point, the particles of a solid ________ so fast that they break free from their fixed positions.
The reverse of melting is the change of state from a liquid to a solid. This is called ___________. • At its freezing point, the particles of a liquid are moving so _________ that they begin to take on _______ positions. • The freezing point of water, ________, is the same as its ________ ________.
What happens t the particles of a liquid as it vaporizes? • The change from a liquid to a gas is called _______________. • ________________occurs when the particles of a liquid gain enough energy to move independently. __________ that takes place only on the surface of a liquid is called ____________.
Vaporization that takes place both below and at the surface of a liquid is called __________. • The temperature at which a liquid boils is called its __________ point.
The reverse of vaporization is called ______________; it is the change in state from a gas to a liquid. ___________ occurs when particles in a gas lose enough _________ _________ to form a liquid.
What happens to the particles of a solid as it sublimes? • ________________ occurs when the surface particles of a solid gain enough energy that they form a gas. • During ______________, particles of a solid _______________ pass through the _________ state as they form a gas.
Essential Questions • At what temperature does ice at sea level melt? • Is the melting point for all substances the same as that that of water? • What are some substances with higher melting points than that of water? • What is the freezing point of water? • Where did you just see this same number? • What can you conclude about freezing points and melting points?
What must happen to the temperature of the liquid for vaporization to occur? • What are some examples of vaporization? • What are two types of vaporization? • What is the difference between the two? • What are some examples of condensation? • When does sublimation occur? • Why do ice cubes that sit in trays for a long time in a freeze get smaller?
Where on or in the solid does sublimation occur? • Is sublimation more like boiling, or more like evaporation? Why?