Introduction to Density


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Use this PowerPoint to complete your Cornell Notes on Density.

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Introduction to Density

  1. 1. Changing Seats TODAY!
  2. 2. Cooperative Groups <ul><li>MANAGER – Organizing, Understanding, Turning in Work </li></ul><ul><li>MATERIALS MANAGER – Collecting, Keeping supplies in good condition, Returning, Organize Table Box </li></ul><ul><li>TIMER/DESIGNER – Track and Communicate Time, In charge of design, sketching and quality of product </li></ul><ul><li>ORAL PRESENTER – Communicator, Asks Questions for the group, Presents finding, Manages Trades </li></ul>
  3. 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:
  4. 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? <ul><li>Use a G.C. </li></ul><ul><li>bxh </li></ul><ul><li>displacement </li></ul>
  5. 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 <ul><li>IDENTIFY # by UNIT LABEL </li></ul><ul><li>Mass #’s = GRAMS </li></ul><ul><li>Volume #’s = mL, cm 3 , cc or any Liter or Cubic unit </li></ul><ul><li>Density #’s = Combination unit labels: g/mL or g/cm 3 or g/cc </li></ul>vs 6. How do you know where to put each number variable in the formula? ‘
  6. 7. <ul><li>The length is 3 cm the width is 4 cm and the height is 5 cm. </li></ul><ul><li>The length is 4 dm, the width is 6 dm and height is 9 dm. The volume is? </li></ul><ul><li>The length is 10 m, the width is 4 meters the height is 7 meters. The volume is? </li></ul>
  7. 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
  8. 9. Substance Mass g Volume cm 3 Density g/cm 3 4. Cube 1 5. Cube 2 6. Cube 3 <ul><li>Cube 4 </li></ul>8. Cube 5 9. Cube 6
  9. 10. <ul><ul><li>Please Circle EITHER Same or Different ….then complete the Sentence. </li></ul></ul>
  10. 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.
  11. 12. <ul><li>Introduction to Density + Cornell Notes- Due Wednesday </li></ul><ul><li>Corrections+ Parent Signature on Test #2 – Due Friday </li></ul><ul><li>End of the Quarter is Friday. </li></ul>