States of Matter & Phase Changes Solid, Liquid, & Gas

Heat Adding Heat Gaining thermal energy Particles move faster & temperature rises Subtracting Heat Losing thermal energy Particles move slower & temperature drops

Solid ( + Heat ) Melting- from solid to liquid Melting Point- temperature when something melts Water’s Melting Point (0 o C) Sublimation- solid directly to gas Ex- Dry Ice

Liquid ( + Heat ) Vaporization- liquid becomes gas Evaporation- takes place at surface & below boiling pt. Boiling- vaporization that occurs below the surface Water’s Boiling Pt (100 o C) Boiling Point- temp when something changes from liquid to gas

Liquid ( - Heat) Freezing- liquid to solid Freezing Point- temp when liquid changes to solid

Gas ( - Heat) Condensation- gas changes into a liquid Ex- Beads of water that form on a glass Deposition- gas directly to solid Ex- Frost

Plasma- (Copy Down on Front of Foldable) Definition 4 th state of matter Made up of charged (positively & negatively) particles Ex: Neon lights, lightning, stars

Brain Pop Video hill.com/sites/ /student_view0/brainpop _movies.html#

Solid, Liquid, or Gas 1.) Which state of matter does this picture represent?

Solid, Liquid, or Gas 2.) Which state of matter does this picture represent?

Solid, Liquid, or Gas 3.) Which state of matter does this picture represent?

Identify the state of matter that matches each statement. 4.) Has a definite shape & volume 5.) Completely fills the container 6.) Has a definite volume but no definite shape because it takes on the shape of the container 7.) Particles have a lot of energy & move very fast; there is space between the particles 8.) Particles have enough energy to slide past each other but are still touching 9.) Particles have very little energy & vibrate in fixed positions

Heat + Heat Gaining thermal energy Particles move faster & temperature rises - Heat Losing thermal energy Particles move slower & temperature drops

Types of Solids Crystalline Solid- particles arranged in a repeating, 3-D pattern called a crystal EXAMPLES- SALT, SUGAR & SAND Amorphous Solid- particles arranged randomly EXAMPLES- RUBBER, GLASS, & PLASTIC

Viscosity of Liquids Viscosity- a liquid’s resistance to flow More viscosity- slower flow Less viscosity- faster flow Surface Tension- uneven forces acting on the particles on the surface, causing surface to act like a film