Changes of State

• What are the states of matter mentioned?

  Solid, liquid, gas
• What happens to mass during a state change?

  Mass is conserved as no particles are created
• What are the processes of state change listed?

  Melting, freezing, boiling, evaporating, condensing, sublimating
• How do physical changes differ from chemical changes?

  Physical changes do not alter original properties
• What is a key characteristic of physical changes?

  Materials recover their original properties if reversed
• Why are state changes considered physical changes?

  Because they do not create new substances
• What is sublimation in the context of state changes?

  Transition from solid to gas without liquid phase
• What happens during condensation?

  Gas turns into liquid as it cools
• What occurs during evaporation?

  Liquid turns into gas at any temperature
• What is the process of melting?

  Solid changes to liquid when heated
• What is freezing?

  Liquid changes to solid when cooled
• How does boiling differ from evaporation?

  Boiling occurs at a specific temperature throughout
• What is the significance of the original properties of materials during state changes?

  They indicate that no new substances are formed
• What is the relationship between state changes and energy?

  Energy is absorbed or released during changes
• What is the reverse process of sublimation?

  Deposition, where gas turns to solid
• What happens to the properties of a material during a physical change?

  The properties remain the same if reversed
• How can you identify a physical change in a material?

  If the material can return to its original state