2. ›If a cube has a density of 45 g/mL and you cut it in half, do the 2 new cubes have the same density of the original? ›Use evidence and explain your answer. Activity 10: Density of Unknown Solids

3. ›If the density of a piece of candy is 3 g/mL and the volume is 6 mL, what is the mass of the piece of candy? Activity 10: Density of Unknown Solids

4. ›If the density of a donut is 24 g/mL and its mass is 72 g, what is the volume of the donut? Activity 10: Density of Unknown Solids

5. Activity 9 UC Assessment

6. Quiz!

7. ›https://www.breakthroughjuniorchallenge.org/?utm_source= Sailthru&utm_medium=email&utm_campaign=Breakthrough %20Junior%20Challenge&utm_term=All%20Usershttps://www.breakthroughjuniorchallenge.org/?utm_source= Sailthru&utm_medium=email&utm_campaign=Breakthrough %20Junior%20Challenge&utm_term=All%20Users Breakthrough Junior Challenge

8. Activity 9 Analysis Questions

9. ›Density=mass/volume ›Mass is measured in grams, or related units such as kilograms. ›Density is not dependent on the size of an object. ›Volume is how much space an object takes up. Activity 9 In Case You Missed It…

10. ›Please open your books to page A41. Activity 10: Density of Unknown Solids

11. ›If you had a 5g piece of plastic and were told its density was 1.1 g/cm 3, how could you identify the type of plastic it was made from? Activity 10: Density of Unknown Solids

12. ›With your group, design a method or procedure to find the density of the unknown metal solids. ›Read the procedure in the book carefully! ›Strive for the most accurate measurement. –Cm to the tenths place (5.4 cm; 7.2 cm; 0.5 cm) *Use the tenths place! –mL to the closest mL (13 mL; 32 mL) –Multiple measurements ›Remember to include materials, safety, and procedure! ›I must approve your plan before you move on! Part A: Identify Solids Using Density

13. ›You are on your own on this one! ›Read the procedure in Part B on page A43-A44. ›Pay attention and complete step 13! Part B: More Density Data

14. Name of Object Mass (g) Volume (cm3 or mL) Density (g/cm 3 or g/mL) Object's Material Class Comparison: Part A

15. ›Light Metal Cylinder Class Comparison: Part B MeasurementMass (g)Volume (mL)Density (g/mL) 14.311.6 24.131.5 34.171.5 44.111.5

16. MeasurementMass (g)Volume (mL)Density (g/mL) 17.141.0 27.131.0 37.141.0 47.151.0 Class Comparison: Part B Dark Metal Cylinder

17. ›With a partner, make a label for the unlabeled mixture. ›As a label designer, consider: –What information from your Chemical Data Sheets will you include? –What directions about handling, storage, and disposal of the mixture will you include? –Have a 1-2 minute speech about your label prepared for next class! Part C: Constructing a Label for the Unlabeled Mixture

18. ›Be sure to do your Activity 9 UC assessment by tomorrow! ›No additional homework for tonight. Tonight’s Homework