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Question 1

Question 1. The gold colored rod has a higher density than the same sized silver rod. What do you think is meant by higher density?. Question 2. Density is an intrinsic substance , that means that the density value is based on the type of substance, not the amount tested.

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Question 1

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  1. Question 1 • The gold colored rod has a higher density than the same sized silver rod. • What do you think is meant by higher density?

  2. Question 2 • Density is an intrinsic substance, that means that the density value is based on the type of substance, not the amount tested. • Compare the density values for the 2 inch silver rod and the 4 inch silver rod. Would you say they are made out of the same material? Explain.

  3. The densities of several metals are given in the table to the right. Use those values to identify the metal rods you determined on Friday Copper: 9.0 g/ml Zinc: 7.1 g/ml Gold: 19.3 g/ml Aluminum: 2.7 g/ml Brass: 8.4 g/ml Lead: 11.36 g/ml Silver: 10.49 g/ml Iron: 7.87 g/ml Question 3

  4. Question 4 • For those who have a golden penny with them, find its mass. • If the volume of a penny is 0.36 ml, what is the density of the penny • Is it solid gold? Is it covered with a thin layer of gold? Explain

  5. Densities of other items • Rocks • Plastic/teflon Crucible

  6. When does something float?

  7. Chem Catalyst

  8. Chem catalyst How can a ship made out of steel (more dense than water) carrying crude oil or containers full of goods (more dense than water) float on water? Why do these people have an easier time floating on the water than somebody at the local swimming pool?

  9. Volume equations of regular shapes Cylinder: V = πr2h Pyramid: V = ⅓Bh Rectangular Prism: V = Lwh Cone: V = ⅓πr2 Sphere: V = ¹⁄3πr³

  10. What do the symbols mean? V = volume r= radius of a circle B = area of the base h = height (length perpendicular to the base) L = length w = width Length, width and height are measurements perpendicular to each other

  11. Finding the Radius Use circumference and diameter to find radius, do not EYEBALL it! Use string to determine circumference Divide the circumference by πto get diameter Divide diameter in half to get radius

  12. Procedure For each object given: • Describe the shape of the container: • Describe object or name the contents • State the equation to find the volume of the shape of the can: • Determine which measurements are needed to calculate the volume of the can

  13. Procedure, part 2 5. For each measurement, identify the unit of measure to be used: • Perform measurements and list in the chart below with the appropriate units • Calculate volume of object • Determine mass of object (!!warning!!) Some objects have the mass measurement on the label. DO NOT PUT LARGE OBJECTS on digital scales • Determine the density of object

  14. Objects Chart Object 1 (Describe__________) Obj 2 (Describe ____________) Calculations: Density value, with units: Calculations: Density value, with units:

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