Matter DESCRIPTIVE PROPERTIES OF

 Extensive Property  depends on the amount of matter present  Intensive Property  depends on the identity of substance, not the amount A. EXTENSIVE VS. INTENSIVE

 Examples:  boiling point  volume  mass  density  conductivity A. EXTENSIVE VS. INTENSIVE intensive extensive intensive

Types of Values DENSITY Mass Volume Density = What are the units for each? g mL g/mL Accepted Value – the ‘book’ value, what the value is supposed to be. Experimental Value – the value found in the lab.

 Indicates accuracy of a measurement PERCENT ERROR your value accepted value A student determines the density of a substance to be 1.40 g/mL. Find the % error if the accepted value of the density is 1.36 g/mL. % error = 2.9 %

 Mass is the amount of matter the object contains.  Matter is anything that has a mass and volume.  Volume is the amount of space an object takes up.  Examples of things that are not matter:  Light and energy  Picture a Golf Ball and a Ping Pong Ball… Which has more mass? More volume? CLASSIFICATION OF MATTER

DIFFERENCES BETWEEN MASS AND WEIGHT Mass Weight 1. Is always a constant at any place and time Depends on gravity at the place 2. Is measured in kilograms in SI unitIs measured in Newtons (not in kilograms as one might think) 3. Is measured using balanceIs measured using scales 4. Can never be zeroCan also be zero 5. Is an intrinsic property of a body and is independent of any external factor. Depends on 1. Mass of the object which is attracting it 2. Force with which it is being attracted (which in turn depends on the distance between the two)

 Physical Property  can be observed without changing the identity of the substance  color  texture  density  viscosity  change in state  solubility  malleability  mass  volume  Chemical Property  describes the ability of a substance to undergo changes in identity  A new substance is produced  reactivity  toxicity  pH  conductivity  tarnishing  fermenting  oxidation MATTER’S CHANGES AND PROPERTIES There are properties that are used to describe matter.