• The metric unit for mass is?

• What effects the mass of a substance?

• If the volume is different for two pieces of Silver will the mass be different? Why?

• If you have two pieces of Calcium with the same volume will their masses be different? Why?

• If you have a piece of Platinum and a piece of Gold with the same volume will their density be the same? Why?

• If you have a unit label of kg/m3 what kind of number do you have?

• What are at least 2 volume units?

• Same or different densities? Why?

• What is the mass?

Magnesium Magnesium

1. What is volume?

• What unit can identify a density number?

• Same or different densities? Why?

• What is the significant difference between a physical & chemical change?

• When will a substance float in water?

Copper Brass

Sample Chemical Symbol

Density g/cm3

Physical Attribute

Lead Pb 11.3 Heaviest Mass

Copper Cu 8.9 OrangeIron Fe 7.9 Magnetic/Rusts

Brass Cu & Zn 8.6 YellowAluminum Al 2.7 Lightest Mass

Zinc Zn 7.1 Dull Gray

Copy chart onto Cornell Notes

Substance Mass g

Volume cm3

Densityg/cm3

4. Cube 1

5. Cube 2

6. Cube 3

1. Cube 4

8. Cube 5

9. Cube 6

• Identify the type of numbers you have. (unit labels)

• Understand what the problem is asking.

• It is a one step problem or two step problem?

• Which formula should you use?

The following formulas are for finding different variables in density problems.

m mv D= =

= D vxm

D v

Please Circle EITHER Same or Different….then complete the Sentence.

Answer in complete sentences:

8. How is Density useful in identifying substances? Explain why a substance, such as gold, cut into different sizes, would have the same density.

Sample Chemical Symbol

Density g/cm3

Physical Attribute

Aluminum Al 2.7 Not Heavy

Copper Cu 8.9 Orange

Methane CH4 .668 Strong Odor

Gold Au 19.3 Yellow

Ice H20 .917 Crystalline

Iron Fe 7.8 Rusts

Lead Pb 11.3 Very Heavy

Seawater H20 + 1.4 Heterogeneous

Wood (average value)

Cellulose 0.8 Can Float

• Introduction to Density + Problems due tomorrow.

• Correct/ Signature on Test #2 – Due FridayEnd of the Quarter is Friday.