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WHAT IS DENSITY AND HOW IS IT MEASURED?

WHAT IS DENSITY AND HOW IS IT MEASURED?. BY Mr. ABRAHAM FUNCHESS JOHN FORD MIDDLE SCHOOL Saint Matthews, SC 803.655.7222. OUR DIRECTOR.

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WHAT IS DENSITY AND HOW IS IT MEASURED?

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  1. WHAT IS DENSITY AND HOW IS IT MEASURED? BY Mr. ABRAHAM FUNCHESS JOHN FORD MIDDLE SCHOOL Saint Matthews, SC 803.655.7222

  2. OUR DIRECTOR Whiz kids, staff, parents, and stakeholders of Calhoun County Public Schools salute you, Dr. Jane Zenger, USC Pathways Project Director, for including us as Pathway partners in a plethora of challenging inquiry-based activities. Abraham Funchess, JFM

  3. INTRODUCTION • WHICH DO YOU THINK IS HEAVIER, A KILOGRAM OF COTTON OR A KILOGRAM OF IRON? • ANS: THEY BOTH WEIGH THE SAME. • HOWEVER, A KILOGRAM OF COTTON TAKES UP A GREATER AMOUNT OF SPACE OR VOLUME. • A KILOGRAM OF IRON TAKES UP LESS SPACE BECAUSE IRON HAS A MUCH GREATER DENSITY THAN COTTON. • SUBSTANCES LIKE IRON ARE HEAVY FOR THEIR VOLUME AND ARE CALLED DENSE SUBSTANCES. Abraham Funchess, JFM

  4. SC STANDARD 6-1 • USE APPROPRIATE TOOLS AND INSTRUMENTS (INCLUDING A SPRING SCALE, BEAM BALANCE, GRADUATED CYLINDER), SAFELY AND ACCURATELY WHEN CONDUCTING A CONTROLLED SCIENTIFIC INVESTIGATION. Abraham Funchess, JFM

  5. TOOLS PURCHASED THROUGH USC PATHWAY PROJECT Platform Balances/Graduated Cylinders Abraham Funchess, JFM

  6. LEARNING OBJECTIVES MASTERED • STUDENTS DEFINED DENSITY. • STUDENT EXPLAINED HOW TO FIND THE DENSITY. • STUDENTS COMPUTED THE DENSITY OF REGULAR AND IRREGULAR OBJECTS. • STUDENTS USED DENSITY TO EXPLAIN WHY ONE SUBSTANCE FLOATS ON TOP OF ANOTHER. Abraham Funchess, JFM

  7. FACTS OF DENSITY EXPLORED • DENSITY IS A PHYSICAL PROPERTY OF MATTER. • EVERY KIND OF MATTER HAS A DENSITY THAT CAN BE MEASURED. • THE DENSITY OF A PURE SUBSTANCE IS ALWAYS THE SAME. • DENSITY DOES NOT DEPEND ON SIZE OR SHAPE OF THE SUBSTANCE. • DENSITY CAN BE USED TO HELP IDENTIFY DIFFERENT KINDS OF MATTER. • IF YOU KNOW THE DENSITY OF A SUBSTANCE, YOU CAN IDENTIFY IT. Abraham Funchess, JFM

  8. KEY TERMS TO KNOW • DENSITY IS THE MASS PER UNIT VOLUME OF AN OBJECT. • MASS IS THE AMOUNT OF MATTER THAT AN OBJECT HAS. • VOLUME IS THE AMOUNT OF SPACE THAT AN OBJECT OCCUPIES. • GRAM IS THE BASIC UNIT OF MASS IN THE METRIC UNIT. • CENTIMETER IS A UNIT OF MEASUREMENT IN THE METRIC SYSTEM. Abraham Funchess, JFM

  9. DENSITY OF A REGULAR OBJECT • YOU CAN FIND THE DENSITY OF A REGULAR OBJECT IF YOU KNOW ITS MASS AND VOLUME. • YOU CAN USE A BALANCE TO FIND THE MASS OF A REGULAR OBJECT. • ONE CAN FIND THE VOLUME OF A REGULAR OBJECT BY MULTIPLYING ITS LENGTH BY ITS WIDTH BY ITS HEIGHT. • NEXT, DIVIDE THE MASS OF THE OBJECT BY ITS VOLUME TO FIND ITS DENSITY. Abraham Funchess, JFM

  10. DENSITY = MASS VOLUME D = M V D = 34.5 g 122.5 cm3 D = .282 g/cm3 VOLUME = L x W x H SOLUTION Abraham Funchess, JFM

  11. AN ALUMINUM BAR OF VOLUME 100 cm3 HAS A MASS OF 270 g. Abraham Funchess, JFM

  12. CALCULATION • DENSITY = MASS ÷ VOLUME • DENSITY = 270 g ÷ 100 cm³ • DENSITY = 2.7 g/cm³ Abraham Funchess, JFM

  13. CHECKING CONCEPTS • DENSITY IS THE ____ PER UNIT VOLUME OF A SUBSTANCE. • THE UNITS OF _____ ARE EXPRESSED IN GRAMS PER CUBIC CENTIMETER. • WHAT MEASUREMENTS MUST BE KNOWN IN ORDER TO FIND THE DENSITY OF A SUBSTANCE? Abraham Funchess, JFM

  14. ANSWERS • MASS • DENSITY • MASS AND VOLUME Abraham Funchess, JFM

  15. PUTTING IT ALL TOGETHER 10 cm 2 cm • WHAT IS THE VOLUME OF THE BAR? • IF THE BAR HAS A MASS OF 500 g, WHAT IS THE DENSITY? Abraham Funchess, JFM

  16. ANSWERS • 400 cm³ • 500 g ÷ 400 cm³ = 1.25 g/cm³ Abraham Funchess, JFM

  17. BLOCK 1 _______________ Mass = 79.4 grams Volume=29.8 cubic cm. BLOCK 2 _______________ MASS= 25.4 grams VOLUME=29.8 cubic cm. FIND THE DENSITY, IDENTIFY THE SUBSTANCE Abraham Funchess, JFM

  18. FINDING THE DENSITY OF IRREGULAR OBJECTS USE THE WATER DISPLACEMENT METHOD TO FIND THE VOLUMN OF IRREGULAR OBJECTS. MEASURE LIWUID VOLUMES CAREFULLY. Abraham Funchess, JFM

  19. Jaquan is concentrating on his density column that lines up with density measurements of various liquids. Abraham Funchess, JFM

  20. Teacher Funchess and Dr. Zenger observe the techniques of Joseph, Jaquan, Xavier and Richard used in measuring and weighing their blocks. Abraham Funchess, JFM

  21. Richard is observing liquids with varied densities jockeying for their rightful positions. Abraham Funchess, JFM

  22. Messiah is observing liquids with varied densities jockeying for their rightful positions. Abraham Funchess, JFM

  23. Dr. Zenger gives Henry a few pointers on reading a graduated cylinder. Abraham Funchess, JFM

  24. Christian is observing liquids with varied densities jockeying for their rightful positions. Abraham Funchess, JFM

  25. Teacher, Abraham Funchess, gives a few tips to Brian on using a platform balance Abraham Funchess, JFM

  26. Stepney’s calculations revealed that milk has a greater density than two other liquids. Abraham Funchess, JFM

  27. Dr. Zenger looks over the shoulders of Brian and Stepney who are using the water displacement method to find the density of their rocks. Abraham Funchess, JFM

  28. GIRLS OF A SINGLE GENDER CLASS GET INVOLVED TOO.. • Phyllis K. Carey CEO PC Solutions C2 Educational Services, shows Daneisha how ultraviolet light effects white beads during one of her visits. Abraham Funchess, JFM

  29. GIRLS OF A SINGLE GENDER CLASS GET INVOLVED TOO.. • Phyllis K. Carey CEO PC Solutions C2 Educational Services, demonstrates for Rashandra and Hope how white beads reacts to ultraviolet light during one of her visits. Abraham Funchess, JFM

  30. GIRLS OF A SINGLE GENDER CLASS GET INVOLVED TOO.. • Phyllis K. Carey CEO PC Solutions C2 Educational Services, helps Shante, Kathleen and Hope summarize the results of an investigation on the effect of ultraviolet light on white beads. Abraham Funchess, JFM

  31. GIRLS OF A SINGLE GENDER CLASS GET INVOLVED TOO.. • Phyllis K. Carey CEO PC Solutions C2 Educational Services, Hope, Shante, Kathleen and Daneisha interpret data recorded during an investigation with ultraviolet light on white beads. Abraham Funchess, JFM

  32. BENEFITS OF PROJECT INCLUDE……. • HAVING FUN WHILE LEARNING HOW TO FIND AND CALCULATE DENSITY OF REGULAR AND IRREGULAR OBJECTS… • INCREASING MATH AND SCIENCE SKILLS NEEDED IN THIS 21ST CENTURY.. • FOCUSING ON HANDS-ON ACTIVITIES • LEARNING TO USE EQUIPMENTS THAT ARE PACT TESTED… Abraham Funchess, JFM

  33. STUDENTS SPEAK OUT ABOUT PROJECT MELNDA SAID, “WE LEARNED HOW TO MEASURE DIFFERENT OBJECTS.” JESUS SAID, "IT WAS AN EXCITING PROJECT.” DEVONTE SAID, ”I LEARNED WHY SOMETHINGS FLOAT AND OTHERS SINK.” ABRAHAM SAID, “I HAD FUN MEASURING AND WEIGHING OBJECTS.” KIjOHN SAID, “THIS PROJECT TAUGHT ME HOW TO DO THE WORK OF REAL SCIENTISTS.” JOSEPH SAID, “IT HELPS ME ENJOY AND LEARN SCIENCE IN A FUN WAY.” Abraham Funchess, JFM

  34. PORTABILITY OF PROJECT • EASY TO DO WITH LITTLE INITIATIVE, EVEN AMONG ELEMENTARY STUDENTS…. • A “MUST DO PROJECT” IN ANY COMMUNITY SCHOOL.. • MATH PROCESS SKILLS CAN BE USE IN ALL ACADEMIC DISCIPLINES .. • DENSITY CENTERS COULD BE SET UP IN ALL CLASSES WITH ONE OR TWO BALANCES AND RULERS AS NEEDED TO REINFOCE CONCEPT.. Abraham Funchess, JFM

  35. “BUOYANCY” “MASS VOLUME AND DENSITY” “MEASURING MATTER” HELPFUL RESOURCES Abraham Funchess, JFM

  36. HELPFUL LINKS… • http://www.visionlearning.com/library/module_viewer.php?mid=37 • http://www.elmhurst.edu/~chm/vchembook/120Adensity.html • http://www.hazelwood.k12.mo.us/~grichert/explore/dswmedia/density.htm • http://www.edinformatics.com/math_science/density.htm • http://www.zyra.org.uk/density.htm Abraham Funchess, JFM

  37. EGGS FLOATING OR SINKING IN WATER COLUMNS OF LIQUIDS SUSPENDED ABOVE EACH OTHER THE AGE OLD QUESTION OF “WHICH IS HEAVIER, A KILOGRAM OF GOLD OR A KILOGRAM OF FEATHERS?” WHETHER WE ARE TALKING ABOUT….. • THE CONCEPT OF DENSITY HAS ALWAYS FACINATED MEN AND IS ONE PROPERTY SCIENTISTS USE TO • IDENTIFY OBJECTS. Abraham Funchess, JFM

  38. THANK YOU DR ZENGER AND THE “USC PATHWAY PROJECT” • “YOU HAVE EMPOWED US WITH THE TOOLS NEEDED TO COMPLETE A CHALLENGING HANDS-ON ACTIVITY.” WHIZ KIDS OF JOHN FORD MIDDLE SCHOOL GENERAL SCIENCE Abraham Funchess, JFM

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