When you finish your quiz, Read pages 49-53, Section 2 When you finish your quiz, Read pages 49-53, Section 2.3, and think about the pictures below as you read. What do these have to do with density? Density

Density The amount of mass per unit volume How to measure: Measure mass with a balance Mass is the amount of matter in a substance Common metric units are grams (g) or kilograms (kg) Measure volume with a graduated cylinder or by using v=l x w x h Volume is the space occupied by a substance Common metric units are liters (L), milliliters (mL), or cubic centimeters (cm3)

Calculating Density mass volume Density = m V D = Units: g/mL or g/cm3

Density is LOVE m V

Using Density in Calculations m D V

Density of a given substance is always the same. Density of 100,000 kL of pure water = 1 g/mL Density of 2 mL of pure water = 1 g/mL

Density allows comparison between materials. Objects with a density > water will sink a density < water will float

Example Problem What is the density of an object with a mass of 60g and a volume of 2cm3?