Changing States: Solids, Liquids, Gases
Changing States: Solids, Liquids, Gases
Items in this lesson
Changing States: Solids, Liquids, Gases
What do you already know about how matter changes from one state to another?
Learning Objective
At the end of the lesson you will be able to describe the particle model for solids, liquids, and gases, name and explain changes of state, and relate these changes to temperature.
What Is the Particle Model?
The particle model explains that all matter is made up of tiny particles. The particles behave differently in solids, liquids, and gases.
How Particles Move in Each State
Solids
In liquids, particles move past each other. In gases, they move freely and spread out.
Particles are packed closely and vibrate. Solids keep their shape.
Liquids and Gases
Changes of State
Changing state happens when temperature changes. The processes are melting, freezing, boiling, and condensing.
State Changes and Temperature
When matter is heated or cooled, it changes state. For example, ice melts to water when heated. Water boils to steam when heated more.
Write down 3 things you learned in this lesson.
Write down 2 things you want to know more about.
Ask 1 question about something you haven't quite understood yet.
