Properties and Changes Matter Properties and Changes

What is Matter? Opposite of energy Has mass and volume Made up of atoms

Mass ( grams or Kilograms) The amount of matter (atoms) in an object Measures how hard it is to change the motion of an object ( its inertia) Measured by a balance

Volume ( mL , L, cm3) The amount of space occupied by an object

Properties of Matter Are traits that describe matter; physical or chemical Intensive- properties that do not change if the amount of matter changes ( melting point, density) Extensive-properties that change as the amount of matter changes ( volume, mass, energy)

Physical Properties Describe the appearance of matter Ex: color, texture, shape, mass, state of matter

States of Matter Solids- definite shape and volume Liquids-definite volume, takes the shape of its container Gases-indefinite shape and volume Plasma-high temperature charged particles ( atm of the sun)

Chemical Properties Describe how matter behaves Ex: flammable, reactive, oxidizes, corrosive, explosive

Physical Changes Matter only changes appearance; it’s still the same substance Ex: Dissolving, Phase Changes

Phase Changes Melting- solid -> Liquid Freezing-liquid -> solid Boiling- liquid -> gas Condensation- gas -> liquid Sublimation- solid-> gas Deposition-gas -> solid + heat energy - heat energy

Chemical Changes Matter changes into a new substance Ex: Burning, Cooking, Chemical Reactions

Classifying Matter

Classifying Matter

Some other examples Solutions- stainless steel, brass, air, unopened can of soda Suspensions- Soil, Pizza, Salad dressing

Examples of Colloids Type Examples Aerosol Clouds, hairspray Smoke, car exhaust Foam Shaving cream Styrofoam, marshmallow Emulsion Mayo, milk, face cream Gel Jelly, jell-O, cheese

Separating Mixtures sp=suspension, sol=solution Filter (sp) Centrifuge(sp) Separatory funnel(sp) Magnetism(all) Evaporation-boil off (sol) Decant-pour off (sp) Distillation(sol) Chromatography(sol)