1. 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

2. 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)

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

4. Density is LOVE m V

5. Using Density in Calculationsm D V

6. 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

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

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