Introduction to Density

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Class NotesTopic: ________________________Questions/Main Ideas:

Name ________________________________________ Class ________________________________________ Period ________________________________________

Date _____________________________________Notes:

Intro to Density

1. What is mass effected by?

2. Will changing the volume change the density?

How tightly packed the particles are in a substance.

A block of iron has very tightly packed particles compared to a block of aluminum.

NO. Density is a RATIO between mass and volume….the particles remain packed the same way no matter what the size of the sample.

3. What does DENSITY measure?

4. What are three ways to find volume?

Density measures the amount of particles (mass) in a certain space (volume).

Which is wood? Which is iron? Why?

1) Use a G.C.2) bxh3) displacement

6. How do you know where to put each number variable in the formula?

7. Will changing the volume change the mass?

Yes. You will have more particles so more mass. BUT the density is the same.

5. What is the Density Formula?

D = m/v

• IDENTIFY # by UNIT LABEL• Mass #’s = GRAMS• Volume #’s = mL, cm3, cc or

any Liter or Cubic unit• Density #’s = Combination unit

labels: g/mL or g/cm3 or g/cc

The length is 3 cm the width is 4 cm and the height is 5 cm.

The length is 4 dm, the width is 6 dm and height is 9 dm. The volume is?

The length is 10 m, the width is 4 meters the height is 7 meters. The volume is?

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

Substance Mass g

Volume cm3

Densityg/cm3

4. Cube 1

5. Cube 2

6. Cube 3

7. Cube 4

8. Cube 5

9. Cube 6

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.

1. Introduction to Density + Cornell Notes- Due Wednesday

2. Corrections+ Parent Signature on Test #2 – Due Friday

End of the Quarter is Friday.

Introduction to Density

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