Matter: Phases and States

A gas

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

At higher temperatures

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

Freezing

• Solid to gas
• Liquid to solid
• Gas to solid
• Liquid to gas

Melting

• liquid to solid
• solid to liquid
• solid to gas
• gas to liquid

Boiling

• liquid to gas
• gas to solid
• gas to liquid
• solid to liquid

Which state of matter has tightly packed molecules?

• solid
• liquid
• gas

What are the states of matter?

• solid, liquid, and juice
• solid and liquid
• solid and gas
• solid, liquid, and gas

Define a liquid.

• Indefinite shape, indefinite volume
• Definite shape, definite volume
• Found in stars
• Definite volume, indefinite shape

How are the particles moving in liquids?

• Sliding past one another
• moving past one another with great speed
• vibrating in a fixed postion

What would cause a decrease in particle movement?

• decrease atoms
• increase in space between atoms
• decrease in temperature
• increase in mass