Solids Liquids and Gases Essential Questions What changes

Solids, Liquids and Gases

Essential Questions: What changes occur in particle motion, temperature, and state of a pure substance when thermal (heat) energy is added or removed?

Solids, Liquids and Gases Gas States of Matter • Also known as phases • Describes a physical property Liquid Solid © Kesler. Science. com

Solids, Liquids and Gases Vibrating, Sliding, Zooming • All matter is made of tiny particles (atoms or molecules), which are in constant motion. • How tightly these particles are packed or bonded determines what state they take. © Kesler. Science. com

Solids, Liquids and Gases • Particles vibrate or move around more if the matter is heated. • Particles vibrate or move around less if the matter is cooled. © Kesler. Science. com

Solids, Liquids and Gases Solids • Have a definite shape and a definite volume • Particles are tightly packed, vibrating about a fixed position. © Kesler. Science. com

Solids, Liquids and Gases Liquids • Have a definite volume, but no definite shape • They take the shape of their container. • Particles are tightly packed, but far enough apart to slide over one another. © Kesler. Science. com

Solids, Liquids and Gases • Have no definite volume and no definite shape • They take the shape of their container. • Particles are very far apart and move freely except when they collide. © Kesler. Science. com

Solids, Liquids and Gases Changes of State • Adding or removing thermal(heat) energy causes a change in state of matter. • States can change from one state to another. © Kesler. Science. com

Solids, Liquids and Gases Phase Changes Description of Phase Change Term for Phase Change Heat Movement During Phase Change Liquid to gas Boiling and evaporation Heat goes into the liquid as it evaporates Gas to liquid Condensation Heat leaves gas as it condenses Solid to liquid Melting Heat goes into the solid as it melts © Kesler. Science. com

Solids, Liquids and Gases © Kesler. Science. com