Warm Up: Floating Box What did you observe?

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Presentation transcript:

Warm Up: Floating Box What did you observe? Why might this be happening? Video Clips: link 1 (Open With Chrome), link 2, link 3

Density of Sulfur Hexafluoride How does understanding density help us understand why objects float or sink? How does this help explain the Coke vs. Diet Coke phenomenon?

Coke vs. Diet Coke Hypotheses – P1

Coke vs. Diet Coke Hypotheses – P3

Coke vs. Diet Coke Hypotheses – P5

Today’s Purpose To describe the relationship between mass, volume, and density To describe how changing a material’s volume affects the object’s mass and density

Mass and Volume Practice To practice reading different measuring tools Meniscus

Exit Ticket Alicia’s cheapskate boyfriend gave her a ring he claims is pure gold. Alicia is skeptical. After class the next day, she measures the mass of the ring, finds the volume of the ring by water displacement, and then calculates the density of the ring. Should she treasure the ring as his first truly generous gift to her, or throw it at him the next time he walks by? The density of gold is 19.3 g/mL. Defend your answer. DATA: Mass: 15.28 g Final volume: 43.7 mL Initial volume: 42.2 mL Volume of ring: __________ Density: __________