Density+Investigation

Do the following three tasks and present your findings. Density is a physical property that can be used to identify substances and determine if something will float. The worth of gold in jewelry can be determined by calculating its density. The quality of some raw materials for producing goods can be determined by calculating its density. Density can also be used to determine how much cargo of a certain type a ship can transport/float.

Task A: Let us suppose that these blocks were rings given to you and you wanted to determine what they were made of. Design a procedure for determining the density of the blocks. Explain the steps you would follow, including the equipment that you would use, and how you would use this equipment to determine the density of these blocks. Measure the density of 4 blocks and organize your measurements and data in a table. Use a density chart to conclude what the blocks are made of.

Task B: Let us suppose your team is applying to be a subcontractor that tests the quality of raw materials by testing their density. Your team is given four tubes to sort by density. Explain the steps you would follow, including the equipment that you would use, and how you would use this equipment to determine the density of these tubes. Measure the density of these tubes and organize your measurements and data in a table. Analyze your data using a graph to determine which tubes have the same density. Report your findings in a conclusion.

Task C: Let us suppose that your team was subcontracted to construct a boat to move a certain cargo. To show you could handle the task, calculate the buoyant forces on a floating tube when it contains two different sized pieces of iron. Explain the steps you would follow, including the equipment you would use, and how you would use this equipment to determine the buoyant force on the floating tube. Use Archimedes’ principle and show your calculations.

Use the scientific method to do this inquiry. Write up how you did this inquiry in four sections that follow the scientific method. __Define the Problem__ __Procedure__ __Analyze the Date__ __Make a Conclusion__

Address the following items where they fit in the four sections above. Writing a topic sentence for each section will help you start.

If you try to make this assignment into a worksheet by addressing the following individually you will be asked to write it in the form above. If you run out of time or refuse to write the inquiry up in the scientific method form, the highest grade you could earn will be 59% because you didn't do the assignment.

Scientific inquiries are usually written up in sections with the following titles. Start each section with a topic sentence and include the information of the numbered points. __ Define the Problem __ 1. Tell what you are investigating and why. (Define your investigation.) __Procedure__ 2. Tell what results your procedure will produce, how it will produce these results, and list the procedure’s steps. 3. Explain what equipment, measurements, and calculations will be used to obtain the data including units. 4. Make accurate measurements, observations, and/or calculations. 5. Organize the measurements and calculated data in some type of table. __ Analyze the Data __ 6. Analyze the data and if it would be useful use a graph. 7. Explain the significance of the data and calculations. __ Conclusion __ 8. Make a conclusion citing your data and/or calculations. 9. Attempt to write and spell well. (Very, very, very, important!)

Use the following to guide to assess the quality of you work. (Three levels of performance: A, C, or Redo) 1. Defined the task/task mostly defined/ description is off 2. Clear steps or procedure/mostly clear procedure/unclear procedure 3. Equipment use explained/mostly explained/kind of explained 4. Mass, volume, and density determined/Mostly/halfway 5. Complete data table / mostly complete / incomplete 6. Data analyzed/ mostly analyzed / incorrectly analyzed 7. Calculations correct/mostly correct/ half correct 8. Clear conclusion / cloudy conclusion / muddy conclusion 9. Presented well/ Decent presentation attempted/Sloppy 10. Presented well/ Decent presentation attempted/Sloppy 11. Presented well/ Decent presentation attempted/Sloppy 12. Presented well/ Decent presentation attempted/Sloppy



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