Introduction to Density

1. The metric unit for mass is?

2. Which form of matter has particles that are free to move independently and collide frequently?

3. Which variable is usually is represented by the x-axis in a data table?

4. Give 2 unit labels for volume.

5. Physical changes to matter do not change what?

6. When CO2(s) changes state directly into a gas without becoming a liquid, we call this______________.

7. Which form of matter has both crystalline and amorphous structures?

8. Plant leaves lose water through evaporation – physical or chemical? Why?

9. Proteins are made from amino acids – physical or chemical? Why?

10. Food is digested – physical or chemical?

11. Which Law states that Mass can neither be created or destroyed?

10. What method would you use to find the volume of a block of wood?

11. What are 3 equivalent formulas for finding the volume of a cube?

12. What are the 3 equivalent units of measurement for volume of an object?

13. When will a substance float in water?

14.What is the vocabulary word for finding the volume of an irregularly shaped object?

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.

A B

A and B = SAME VOLUME (same size)

A B

A and B = SAME VOLUME (same size)

A B

A and B = DIFFERENT MASS (amount of particles; different substance)

Different Densities

C D

C and D = DIFFERENT VOLUME (different size) but same substance

C D

C and D = DIFFERENT VOLUME (different size) but same substance

Same Densities-

particles are packed the

same way

Vocabulary Pictures

Fold blank paper in half landscape style

1. VOLUME – amount of space

• mL, cm3, cc

2. DENSITY – how the particles are packed- RATIO

• g/mL , g/cm3, g/cc, kg/m3

3. MASS – amount of particles

• Any gram unit

Write these vocabulary words on the left side

1. Two cubes with the same volume

2. Two cubes with different volume

3. Two cubes with the same volume and same density

4. Two cubes with the same volume and different density

5. Two cubes with the same volume and same mass

6. Two cubes with the same volume and different mass

Illustrate the following on the Right side

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

You will need this chart to ID substances.

Substance Mass (g)

Volume (cm3)

Density(g/cm3)

4. Cube 1= _________

5. Cube 2 = _________

6. Cube 3 = _________

7. Cube 4 = _________

8. Cube 5 = _________

9. Cube 6 = _________

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

Copy chart onto Cornell Notes

1. THINK about the concepts of VOLUME, DENSITY and MASS.

2. Circle same or different.

3. Explain WHY.

1. THINK about the concepts of VOLUME, DENSITY and MASS.

2. Circle same or different.

3. Explain WHY.

#5. Objects A and B have the same or different densities because

Iron Iron

A B

They are the same substance & the particles are packed the same way

1. Identifying Volume Lab – Due Some Time Today

2. Test #1 – Part 2 Corrected and Signed – Due Today

3. Introduction to Density due Tomorrow.