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Name___________________________ Period ____ Date _______________ Science Density is the ratio of the mass of the substance to the volume of the substance at a given temperature. Density has units of g/ cm3 or g/c.c. or g/mL for liquids and solids, and g/L for gases. Density is an intensive property. Density varies with change in temperature. 1. Define mass? ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ 2. Define volume? ______________________________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ ______________________________________________ 3. Define density and show the formula for calculating density. 3. Calculate the densities of the following objects. Remember to place units after each number. Object A length = 6cm width = 3cm height = 1cm mass = 36g volume = _____ density = _____ Show Work Object B length = 10cm width = 5cm height = 2cm mass = 300g volume = _____ density = _____ Show Work Object C Use the water displacement method to determine the density of object C (silly putty) initial water level in graduated cylinder = 25ml final water level after placing silly putty into graduated cylinder = 29ml mass of silly putty=8g volume = _____ density = _____ Show Work 4. A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. Is the ring pure gold? (The density of gold is 19.3 g/mL.) SHOW WORK 5. What volume would a 0.871 gram sample of air occupy if the density of air is 1.29 g/L? 6. Pumice is volcanic rock that contains many trapped air bubbles. A 225 gram sample occupied 236.6 mL. What is the density of pumice? 7. Will pumice float on water? The density of water is 1.0 g/mL.)