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Monday, August 31, 2009 Record your homework immediately.

Monday, August 31, 2009 Record your homework immediately. TODAY is the final day for turning in your Safety Contract and signing Class Procedures (electronically). Any student not turning in these documents by today will earn detention until the missing documents are submitted.

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Monday, August 31, 2009 Record your homework immediately.

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  1. Monday, August 31, 2009 Record your homework immediately. TODAY is the final day for turning in your Safety Contract and signing Class Procedures (electronically). Any student not turning in these documents by today will earn detention until the missing documents are submitted. Unpack notebook, calculator, and writing utensil. Each table will need a pair of scissors, a metric ruler and tape. You do NOT have to sign in today.

  2. Measurement (review) • What does “SI” mean? • What is the standard unit used for measuring length? • What is the most commonly used unit for measuring mass? • In what unit would the volume of a container of milk be measured? • In what unit would the volume of soil for a garden be measured? • Of the four common phases of matter, which is considered a fluid?

  3. understanding density Your cube? regular objects – use formula l x w x h = units 3 What is volume? …the amount of space something takes up

  4. understanding density regular objects – use formula l x w x h = units 3 How much water will fit in your cube? irregular objects – use water displacement Water displacement works because 1 mL = 1 cm3 What is volume? …the amount of space something takes up

  5. understanding density • What is mass? …the amount of matter something contains

  6. Our 1 cm3 volume cube • holds 1 mL of WATER • and has a mass of: • 1 gram. Write a sentence in your own words that describes this relationship between solid and liquid volume and mass within the metric system.

  7. What is density? how much mass is packed into an object’s volume d = m / V • dis the object's density (sometimes a p is used instead of a d) • mis the object's total mass (standard = measured in kilograms) • V is the object's total volume (standard = measured in cubic meters) • The SI unit (metric) of density is the kilogram per cubic meter (kg/m3). We will usually measure volume in smaller units, such as grams and cubic centimeters making the unit g/cm3.

  8. Which object would have a higher density? a b • Mass 7295 grams • Volume 5422 cm3 • Mass 5300 grams • Volume 5422 cm3 D = m/V D = 7295 g/5422 cm3 = 1.34 g/cm3 D = m/V D = 5300 g/5422 cm3 = 0.98 g/cm3 D=M/V or D = 7295 g/5422 cm3 = 1.34 g/cm3 (a sinker) D=M/V or D = 7295 g/5422 cm3 = 1.34 g/cm3 (a sinker) Will these two objects sink or float in water? Why? What if I told you they were both bowling balls? Distilled water has a density of 1 g/cm3.

  9. Copy the data table into your notebook. • Update your Table of Contents. • As I go over each event, use INK to record an estimate of how you will perform. • You will need an accountability partner. Be sure to put their name in your notebook. • Competition will be tomorrow.

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