22 Phases of Matter PHASES OF MATTER Matter

#22 Phases of Matter

PHASES OF MATTER • Matter on Earth can exist as 4 different phases or states. – Solid – Liquid – Gas – Plasma

SOLID • Has a definite volume and a definite shape. • The atoms or molecules in a solid are strongly attracted to one another and tightly packed. • Examples: – Rocks – Desk – Apple

LIQUID • has a definite volume but no definite shape. • The atoms or molecules in a liquid are attracted to each other, but not as strongly as those of a solid. • Particles are free to move over and around each other. – Water – Blood – Milk

GAS • Has no definite volume and no definite shape. • The atoms or molecules of gases have very little attractive force on each other. This causes them to move freely and independently. • The atoms or molecules move apart until they’re evenly spaced throughout the container they are placed in. • Examples: – Air (mixture of different gases) – Water Vapor (water in a gas form)

Solid / Liquid / Gas Particles

Plasma • Most of the matter in the universe, like the stars and sun, is in the plasma state. • Is an electrically charged gas • Plasma exists at very high temperatures and pressures.

Plasma on Earth • On Earth, plasma is found in lightning bolts. • Also in Plasma TV’s, Fluorescent Bulbs, and Neon Signs!

Examples of Particles Moving • http: //www. harcourtschool. com/activity/stat es_of_matter/ • http: //teacher. scholastic. com/activities/stud yjams/matter_states/

PHASE CHANGES • List the following phases changes as Activity #26 in your notebook. Indicate the matter phase change that happens (i. e. solid liquid) – Melting – Evaporation – Sublimation – Freezing – Condensation – Deposition

PHASE CHANGES • Matter will change phases when heat is added or lost. – Melting: solid liquid (heat is added) – Sublimation: solid gas (heat is added) – Evaporation: liquid gas (heat is added) – Freezing: liquid solid (heat is lost) – Condensation: gas liquid (heat is lost) – Deposition: gas solid (heat is lost)

PHASE CHANGES DEPOSITION Evaporation Condensation Liquid Freezing Melting Solid SUBLIMATION Gas