Chapter 3 Lesson 6

Chapter 3 Lesson 6 Changes of States

Melting Melting point Freezing Vaporization Evaporation Boiling Boiling point Condensation Sublimation

Vocabulary Words

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.

What happens to the particles of a solid as it melts?

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 ________ ________.

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 ____________.

What happens t the particles of a liquid as it vaporizes?

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.

________________ 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.

What happens to the particles of a solid as it sublimes?

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?

Essential Questions

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?