Investigating Density and Buoyancy Question - Thingiverse
Investigating Density and Buoyancy
Question: How can an object with a density greater than 1 g/mL float on water? Materials: -
500 mL graduated cylinder 25 mL graduated cylinder Eye dropper 3D printed cylindrical boat 3D printed cylindrical boat mold scale water
Safety: -
Remember to use caution when placing objects into your 500 mL graduated cylinder. Objects should be placed in the cylinder at an angle.
Prediction: You know that the density of an object affects whether it will sink or float. Predict whether the 3D printed cylindrical boat will float. The density of the material in the cylindrical boat is greater than 1 g/mL
Procedure 1. Mass the cylindrical boat. Record the mass here: _____________ 2. Fill the 500 mL graduated cylinder with at least 400 mL of water. Use the eye dropper to ensure that you can take a precise measurement. 3. Record the initial volume in table 1. 4. Carefully place the 3D printed boat into the 500 mL graduated cylinder. 5. Record the final volume in table 1. 6. Find the difference between the final volume and the initial volume. Record the result in table 1. Table 1: Volume of Water Displaced by Boat
Initial Volume (mL)
Final Volume (mL)
Total Displaced Volume
Cylindrical Boat
7. Observe how high the water level rises on the boat. Draw a sketch below to indicate how high the water level reaches.
8. 9. 10. 11. 12.
Mass an empty 25ml graduated cylinder and record the mass here: _____________. Fill the 25 mL graduated cylinder with the total displaced volume you calculated in step 5. Mass the cylinder and water. Record the mass here: ______________. Calculate the mass of the displaced water: ____________________. Pour the water measured in step 7 into the 3D printed cylindrical boat mold. Record your observations here.
Analyze: 1. Compare the mass of the cylindrical boat with the mass of the displaced water. What do you notice?
2. Compare your observations from steps 7 and 12. What do you notice?
3. Archimedes’ principle states that the buoyant force acting on an object equals the weight of the displaced fluid. What is the buoyant force acting on the cylindrical boat? Hint: 1000 g = 9.81 N.
4. The boat which has a density greater than 1 g/mL is able to float on water. Explain how this is possible. Use what you know about density, buoyancy and Archimedes’ principle in your answer.
5. There is a chance for error in every experiment. Suggest ways to improve the accuracy of your measurements.
Reflect: 1. What did you learn in this investigation? What further investigations, if any, would you like to perform as a result of what you have learned and experienced today?
Looking Ahead: 1. Your lab group will be tasked with calculating how much mass the cylindrical boat can hold before it sinks. You will develop a procedure and test out your hypothesis.
Question: How can an object with a density greater than 1 g/mL float on water? Materials: -
500 mL graduated cylinder 25 mL graduated cylinder Eye dropper 3D printed cylindrical boat 3D printed cylindrical boat mold scale water
Safety: -
Remember to use caution when placing objects into your 500 mL graduated cylinder. Objects should be placed in the cylinder at an angle.
Prediction: You know that the density of an object affects whether it will sink or float. Predict whether the 3D printed cylindrical boat will float. The density of the material in the cylindrical boat is greater than 1 g/mL
Procedure 1. Mass the cylindrical boat. Record the mass here: _____________ 2. Fill the 500 mL graduated cylinder with at least 400 mL of water. Use the eye dropper to ensure that you can take a precise measurement. 3. Record the initial volume in table 1. 4. Carefully place the 3D printed boat into the 500 mL graduated cylinder. 5. Record the final volume in table 1. 6. Find the difference between the final volume and the initial volume. Record the result in table 1. Table 1: Volume of Water Displaced by Boat
Initial Volume (mL)
Final Volume (mL)
Total Displaced Volume
Cylindrical Boat
7. Observe how high the water level rises on the boat. Draw a sketch below to indicate how high the water level reaches.
8. 9. 10. 11. 12.
Mass an empty 25ml graduated cylinder and record the mass here: _____________. Fill the 25 mL graduated cylinder with the total displaced volume you calculated in step 5. Mass the cylinder and water. Record the mass here: ______________. Calculate the mass of the displaced water: ____________________. Pour the water measured in step 7 into the 3D printed cylindrical boat mold. Record your observations here.
Analyze: 1. Compare the mass of the cylindrical boat with the mass of the displaced water. What do you notice?
2. Compare your observations from steps 7 and 12. What do you notice?
3. Archimedes’ principle states that the buoyant force acting on an object equals the weight of the displaced fluid. What is the buoyant force acting on the cylindrical boat? Hint: 1000 g = 9.81 N.
4. The boat which has a density greater than 1 g/mL is able to float on water. Explain how this is possible. Use what you know about density, buoyancy and Archimedes’ principle in your answer.
5. There is a chance for error in every experiment. Suggest ways to improve the accuracy of your measurements.
Reflect: 1. What did you learn in this investigation? What further investigations, if any, would you like to perform as a result of what you have learned and experienced today?
Looking Ahead: 1. Your lab group will be tasked with calculating how much mass the cylindrical boat can hold before it sinks. You will develop a procedure and test out your hypothesis.
