Density A.The density of a substance is the ratio of mass to volume (grams per milliliters). B.Density is a characteristic property of a material and does.

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Presentation transcript:

Density A.The density of a substance is the ratio of mass to volume (grams per milliliters). B.Density is a characteristic property of a material and does not depend on sample size; an example of an intensive property, a property independent of mass C.Density is temperature dependant. Supplemental packet page 15

Measuring an Object’s Density mL mL 380. mL g g/mL g/mL D = __________ = g 380.mL 1000mL 1500mL 2000mL

An Adventure in Buoyancy An object floats when it overall mass is less than the mass of the volume of liquid it displaces. What was the object’s mass? What was the object’s volume? What volume of liquid was displaced by the object? What is the mass of the liquid displaced? mass of object was g volume of can and volume of liquid displaced = 380.mL H2OH2O mass of water displaced? _________ g D H2O = 1g/1mL 380 Our final hypothesis regarding why an object floats in a liquid To validate our hypothesis, we must answer the following four questions displaced liquid volume = object volume These two questions are related Volume to mass conversions require that density be known for a given substance

Temperature Conversions °F = 1.80 (°C) + 32 °C = (°F - 32) x K = °C memorize this one To roughly convert °F to °C, subtract 32 from °F, then divide by 2.

Complete this table for practice

Conversion Answers