MATTER VERSUS ENERGY matter: takes up space (volume) and has mass energy: a force that acts upon matter Are matter (mass) and weight the same? NO

CLASSIFICATION OF MATTER MATTER Substance Mixture ElementCompound Homog.Heterog. simplest form of matter; chemically combines to form compounds

CLASSIFICATION OF MATTER can be separated into simpler substances by chemical rxn MATTER Substance Mixture ElementCompound Homog.Heterog.

CLASSIFICATION OF MATTER completely uniform composition – components are evenly distributed (solution) MATTER Substance Mixture ElementCompound Homog.Heterog.

CLASSIFICATION OF MATTER not uniform composition – samples are not the same in different areas MATTER Substance Mixture ElementCompound Homog.Heterog.

STATES OF MATTER

STATES OF MATTER: SOLID definite volume and shape particles packed closely together incompressible low kinetic energy

STATES OF MATTER: LIQUID can flow; definite volume takes the shape of a container particles in close contact incompressible; can expand upon heating medium kinetic energy

STATES OF MATTER: GAS particles take shape and volume of container particles are far apart highly compressible high kinetic energy

PHYSICAL VS CHEMICAL PROPERTIES PHYSICAL: quality that can be measured without changing its composition examples: color, solubility, hardness, density, melting and boiling point

PHYSICAL VS CHEMICAL PROPERTIES CHEMICAL: quality that can be found only by changing the composition of a substance examples: reactivity, heat of combustion, chemical stability

PHYSICAL CHANGE change that alters a substance without changing its composition examples: boil, freeze, dissolve, bend, grind, cut change of state reversible

CHEMICAL CHANGE one or more substances change into new substances examples: burn, rot, rust, explode, decompose energy is given off or absorbed odor or color change irreversible