The document provides information about cooperative group roles and an introduction to density. It defines density as a ratio of mass to volume and explains that density remains the same even if the volume of a substance changes. It lists common materials and their densities and includes sample density problems and a chart to complete.

1. Changing Seats TODAY!

2. Cooperative Groups MANAGER – Organizing, Understanding, Turning in Work MATERIALS MANAGER – Collecting, Keeping supplies in good condition, Returning, Organize Table Box TIMER/DESIGNER – Track and Communicate Time, In charge of design, sketching and quality of product ORAL PRESENTER – Communicator, Asks Questions for the group, Presents finding, Manages Trades

4. 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 . vs. 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. Class Notes Topic: ________________________ Questions/Main Ideas: Name ________________________________________ Class ________________________________________ Period ________________________________________ Date _____________________________________ Notes:

5. 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). vs. Which is wood? Which is iron? Why? Use a G.C. bxh displacement

6. 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, cm 3 , cc or any Liter or Cubic unit Density #’s = Combination unit labels: g/mL or g/cm 3 or g/cc vs 6. How do you know where to put each number variable in the formula? ‘

7. 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?

8. 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

9. Substance Mass g Volume cm 3 Density g/cm 3 4. Cube 1 5. Cube 2 6. Cube 3 Cube 4 8. Cube 5 9. Cube 6

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

11. 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.

12. Introduction to Density + Cornell Notes- Due Wednesday Corrections+ Parent Signature on Test #2 – Due Friday End of the Quarter is Friday.