Matter Phase Changes Review

Matter

• Phase changes happen with a change of energy or temperature
• When more kinetic energy is added, the particles move faster
• Ex:
• Boiling, freezing, melting

Solids and liquids

• Solids have particles close to each other
• Liquids have room to slide and glide
• Solid->liquid: melting
• Liquid->Solid: freezing
• Melting/freezing point: temperature at which a substance melts/freezes

Liquids and Gases

• Gases have room to move freely
• Liquid->Gas Boiling(bubbles)/Evaporation over time
• Gas->Liquid Condensation

Solid and Gas

• Solid->gas: Sublimation
• ex: Dry ice
• Gas-solid: depostion
• ex: frost