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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

Chapter 3 Lesson 6

Changes of States

vocabulary words
Vocabulary Words
  • Melting
  • Melting point
  • Freezing
  • Vaporization
  • Evaporation
  • Boiling
  • Boiling point
  • Condensation
  • Sublimation
what happens to the particles of a solid as it melts
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.
slide4

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
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 ____________.
slide6

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.
slide7

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
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
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?
slide10

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?
slide11

Where on or in the solid does sublimation occur?

  • Is sublimation more like boiling, or more like evaporation? Why?