Chapter 3 Lesson 6

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# Chapter 3 Lesson 6 - PowerPoint PPT Presentation

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?