1. DENSITY A Quantitative Physical Property

2. Which Weighs More?? A Pound of Lead -or- A Pound of Feathers

3. If You’re Stumped… You’re Thinking About DENSITY

4. A measurement of the quantity of mass per unit of volume

5. Density Is an Intensive Property… It is NOT dependent on the amount of a substance present

6. Density Is a useful tool for identifying pure substances Each substance has a unique density value

7. The Formula:

8. Units of Density Generally expressed as grams per milliliter (or grams per cm 3 )

9. To Measure Mass: Use a Balance

10. To Measure Volume Use a formula (for regular objects) L x W x H for a cube

11. What about Irregular Objects? Use “Water Displacement”

12. Technique: Use a Graduated Cylinder Subtract initial volume from final volume

13. Practice Problems (POC): Complete problems 1, 2, 3, and 4 on Density Handout Sheet Use dimensional analysis and sig figs (we’ll go over the answers)