Changes of State

In a solid, the particles

• vibrate in place
• slide past one another
• overcome the strong attraction

A gas

• has a definite shape but no definite volume
• has a definite volume but no definite shape
• has fast-moving particles

The reverse of condensation is

• sublimation
• evaporatio
• boiling

In an ________ change, energy is added to a substance.

• Endothermic
• Viscosity
• Boyle's Law

Which changes of state are exothermic changes?

• condensation and freezing
• melting and evaporation

Which changes of state are endothermic changes?

• freezing and evaporation
• evaporation and melting

At higher temperatures

• particles in an object have less energy
• particles in an object move faster
• a gas contracts

Balloons can be twisted into shapes because

• the force exerted changes the number of particles
• the volume of a gas is constant
• particles of gas can be compressed

Which of the following occurs when a liquid becomes a gas?

• the particles slow down
• the particles beak away from one another
• the particles move closer together

What term describes a solid changing to a liquid?

• Deposition
• Sublimation
• Freezing 
• Melting