Sink & Spill Lab (Displacement)
Summary
The buoyant force of a solution is equal to the weight of the fluid displaced by the object. In this lab, you will use data on floating and sinking objects to practice the skill of drawing conclusions.
CollapseLearning Goals
1. control variables 2. interpret data 3. form conclusions between the displaced fluid and the buoyant force
Context for Use
In class lab: Equipment, paper towels, orange plate, triple-beam balance, 250 mL beaker, table salt, jar with watertight lid
Skills: student should know how to use triple beams & beakers
Buoyancy is the unit.
Easy to adapt to different grades.
Original grade level is 9th grade.
Skills: student should know how to use triple beams & beakers
Buoyancy is the unit.
Easy to adapt to different grades.
Original grade level is 9th grade.
Description and Teaching Materials
This lab reinforces the concept of the buoyant force. Notes/lecture should have occurred, Bill Nye Buoyancy is good review of the buoyant force. You will need; Equipment, paper towels, orange plate, triple-beam balance, 250 mL beaker, table salt, jar with watertight lid. Closure, review how the water displaced by the object relates to the buoyant force. Ask how the hypothesis could be adapted to modify the lab. ex. add salt to the water, how would the buoyant force be effected. This was reword from Prentice Halls Physical Science 2007, p386. The lab was retyped to allow students answers on a single sheet of paper. [file 'Sink & Float Lab']
Teaching Notes and Tips
Prepare all material the day before and do the lab yourself. Review safe use of science equipment and have students wear safety glasses.
Assessment
The assignment will be reviewed/graded in class, then handed in for credit. Assessment will be ongoing as student do the lab and I observe their labs in progress. Ask each group to explain how the water displaced related to the mass of the obect.
Standards
9-12.II.E.2