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Published byΝαβουχοδονόσορ Κακριδής Modified over 5 years ago
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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.
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Significant Figures Practice.
0.085cm cm cm= .29 cm 12 g g g = 20 cm mL – 28.9 mL = 116.7 mL 282.2 km x 3.0 km = 850 km2 5.00 mm x mm = 36.6 mm2 4.23m2 / m = 0.223 m
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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
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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 pounds
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Qualitative versus Quantitative
Describes items in terms of some quality or category Color Texture Look Quantitative Capable of being measured Height Weight Mass Volume
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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 pounds
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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
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Examples Color Temperature Mass Volume Density Concentration Intensive
Extensive Volume Density Concentration
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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
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Examples Burning Paper Temperature increase Crushing ice Baking bread
Chemical Temperature increase Intensive Physical Crushing ice Baking bread Rusting Melting steel or ice
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