V.Density

A. What is density? Density is how much matter (mass) there is in a certain amount of space (volume)

Which one is more dense? Demonstration: People in a square How about this: Which square is more dense?

Which one is more dense? Now which one is more dense?

A. What is Density Cont. Need 2 measurements to calculate density Mass Volume

÷ × A. What is density cont. M D V DENSITY OF WATER = 1.00 g/mL   M ÷ ALWAYS REMEMBER UNITS! × D V DENSITY OF WATER = 1.00 g/mL

Let’s try a density problem together Frank’s paper clip has a mass of 9 g and a volume of 3 mL. What is its density? Density = Mass  Volume Density = 9 g  3 mL = 3 g/mL M ÷ × D V

Let’s try a density problem together Frank’s eraser has a density of 6.0 g/mL and a volume of 2.0 mL. What is its mass? Mass = Density × Volume Mass = 6.0 g/mL × 2.0 mL = 12g M ÷ × D V

Let’s try a density problem together Frank’s shot-put has a mass of 500 g and a density of 100 g/mL. What is its volume? Volume = Mass  Density Volume = 500 g  100 g/mL = 5 mL M ÷ × D V