Name__________________________________________ Date______________ Period_______________ Buoyancy and Density Purpose The purpose of this lab is to determine how density affects buoyancy. Hypothesis The egg will float in salt water because… Materials 1. Balance 2. Beaker 3. Salt 4. Egg 5. Spoon Procedures 1. Calculate the density of egg. a. Measure the egg’s mass on the balance. b. Use volume displacement to calculate the egg’s volume. 2. Calculate the density of fresh water. a. Measure the mass of the empty graduated cylinder. b. Measure the mass of the graduated cylinder with 10mL of fresh water. c. Calculate the density of the fresh water. 3. Make egg float by adding salt to water. 4. Calculate the density of salt water, as you did for the fresh water. Data Name__________________________________________ Date______________ Mass (g) Volume (mL) Period_______________ Density (g/mL) (mass ÷ volume) Egg Fresh water Graduated cylinder + fresh water Graduated cylinder alone Net mass of fresh water 10 mL Salt water Graduated cylinder + salt water Graduated cylinder alone Net mass of salt water 10 mL Data Analysis Write a paragraph describing your results, including the calculations you did in order to get these results. Compare the density of the egg with the density of the fresh water and the salt water. Conclusion Paragraph 1: Explain the purpose of the lab, and your hypothesis. Summarize your results. Paragraph 2: Explain why the egg floated in the salt water and sank in the fresh water. By explaining the significance of your results answer the essential question: how does density affect buoyancy?