Properties of Matter Targets Agenda HW Check Review Sig Figs Properties of Matter Notes Properties of Matter Mini Lab Quiz tomorrow on terms and sig figs HW: Read through gold penny lab and do pre- lab. Identify the physical or chemical properties of matter. Calculate the density of metals.
Significant Figures Practice. 0.085cm + 0.062cm + 0.14 cm= .29 cm 12 g + 0.031 g + 7.969 g = 20 cm 145.63 mL – 28.9 mL = 116.7 mL 282.2 km x 3.0 km = 850 km2 5.00 mm x 7.3216 mm = 36.6 mm2 4.23m2 / 18.941 m = 0.223 m
Measurement versus observation Includes a number and a unit A definite number of something Observation Information obtained by your senses Sight Smell Touch Sound Taste
Examples 83o F Furry Greenish-blue Mass of 2.37 grams Sweet and Sour Measurement Furry Observation Greenish-blue Mass of 2.37 grams Sweet and Sour Weight of 45.64 pounds
Qualitative versus Quantitative Describes items in terms of some quality or category Color Texture Look Quantitative Capable of being measured Height Weight Mass Volume
Examples 83o F Furry Greenish-blue Mass of 2.37 grams Sweet and Sour Quantitative Furry Qualitative Greenish-blue Mass of 2.37 grams Sweet and Sour Weight of 45.64 pounds
Intensive versus Extensive Properties A property that DOES NOT DEPEND on the amount of matter you have Boiling Point Freezing Point Density Extensive A property that DOES DEPEND on the amount of matter you have Mass Volume
Examples Color Temperature Mass Volume Density Concentration Intensive Extensive Volume Density Concentration
Physical versus Chemical Properties A quality or condition of a substance that can be observed or measured without changing the substance’s composition State Melting point Color Will either be intensive or extensive Chemical Ability of a substance to undergo a specific chemical change that ALWAYS changes the composition Something changes in the material
Examples Burning Paper Temperature increase Crushing ice Baking bread Chemical Temperature increase Intensive Physical Crushing ice Baking bread Rusting Melting steel or ice