Name: __________________________________________________Period: _________
Buoyancy Common Assessment
/25
©Sue Boudreau, Greta Heintz, Stephanie Kreutzer 12.13.2011
1. Use arrows to show the direction and size of the forces acting on the wood ball floating
in water.
(2pts for named forces, 2pts for correct directions, 2pts for relative sizes of the forces)
2. Use arrows to show the direction and size of the forces acting on the lead weight sunk in
water.
(2pts for named forces, 2pts for correct directions, 2pts for relative sizes of the forces)
Name: __________________________________________________Period: _________
3. Explain how a wood ball floats. Use physics terms such as mass, volume, density,
displacement, forces, gravity and buoyancy. You can include a diagram if you wish. (Hint:
Write/draw the explanation first, add physics terms after if you have not already put them in. We
will grade it for making sense, rather than how many terms you include.)
RUBRIC:
8pts: Explanation is complete, accurate and logical. Uses physics terms correctly.
7 pts: A very minor error or omission
6 pts: An error or slight confusion but the basic idea is correct.
5 pts: Some confusion but with some parts correct.
4 pts: One correct piece of information, very confused.
4.
a. Give a specific example of when density and buoyancy are important in the real
world. (Hint: Consider earth systems, transportation, cooking, sports, medicine etc.)
b. Explain how your example in the real world (part 4a) relates to density and/or
buoyancy.
RUBRIC:
5pts for a relevant example, that explains how it relates to buoyancy and/or density. More than a 1word answer.
4pts for a relevant example with a slightly confused explanation.
3pts for a 1- word answer that is relevant to buoyancy and/or density.
Name: __________________________________________________Period: _________Box Number: _________________
DENSITY COMMON ASSESSMENT LAB /23
1. Calculate the density of the plastic, regular (geometric) shape in your box using the ruler,
calculator and scale. Show your measurements, units, the equations used, calculations. Be sure
your teacher can follow exactly what you did.
RUBRIC:
1pt for showing units throughout your work
1pt for showing the equations accurately.
1pt for showing your calculations.
3 pts for the right answer including units. TOTAL of 6pts
2. Calculate the density of the irregular-shaped object in your box using water, a graduated
cylinder, calculator and scale. Show your measurements, the equations you used, the units and
your calculations. Be sure your teacher can follow exactly what you did.
RUBRIC:
1pt for showing units throughout your work
1pt for showing the equations accurately.
1pt for showing your calculations.
3 pts for the right answer including units. TOTAL of 6pts
Name: __________________________________________________Period: _________Box Number: _________________
3. Calculate the density of the liquid in your box using the graduated cylinder, the scale and
the calculator. Show your work including units, the equations you used and your calculations so
your teacher can easily follow what you did.
RUBRIC:
1pt for showing units throughout your work
1pt for showing the equations accurately.
1pt for showing your calculations.
3 pts for the right answer including units. TOTAL of 6pts
4. Which of the above objects will float in a NON-water fluid that has a density of 13.5
g/cm3?
1pt for each right answer
5. EXTRA CREDIT: What might be the liquid in question 7? (+1pt)
6. Write a question you have about density and buoyancy:
2pts for a question related to density and buoyancy that shows understanding of the concepts in this
unit.