6. Introduction to Density A substance’s density is the measure of the mass of material within a certain volume . (amnt of space taken up) The mass (amnt of particles) is affected by how tightly packed the molecules are within the space.

7. Introduction to Density A B A and B = SAME VOLUME (same size)

8. Introduction to Density A B A and B = SAME VOLUME (same size) A B A and B = DIFFERENT MASS (amount of particles; different substance) Different Densities

9. Introduction to Density C D C and D = DIFFERENT VOLUME (different size) but same substance

10. Introduction to Density C D C and D = DIFFERENT VOLUME (different size) but same substance Same Densities- particles are packed the same way

11. Let’s Review Vocabulary Pictures Fold blank paper in half landscape style

14. You will need this chart to ID substances. Sample Chemical Symbol Density g/cm3 Physical Attribute Lead Pb 11.3 Heaviest Mass Copper Cu 8.9 Orange Iron Fe 7.9 Magnetic/Rusts Brass Cu & Zn 8.6 Yellow Aluminum Al 2.7 Lightest Mass Zinc Zn 7.1 Dull Gray

16. Copy chart onto Cornell Notes Sample Chemical Symbol Density g/cm3 Physical Attribute Lead Pb 11.3 Heaviest Mass Copper Cu 8.9 Orange Iron Fe 7.9 Magnetic/Rusts Brass Cu & Zn 8.6 Yellow Aluminum Al 2.7 Lightest Mass Zinc Zn 7.1 Dull Gray