Unit 3: Buoyancy and Density

     This unit was all about buoyant force and measuring the density of objects. We learned how density affects the buoyant force of an object and used the density formula D=M/V (V=M/D, M=VD). We went through different labs to help us understand how the buoyancy and density of objects are linked when making objects float. Through this unit we learned how different elements, like air and density, combined to create more or less buoyancy, and how the density of objects is dirrectly related to the volume, and the mass of objects.

Ian, Jackey, Jannell, Will

8th Grade Science Standards Covered:

All objects experience a buoyant force when immersed in a fluid. As a basis for understanding this concept:

1. Students know density is mass per unit volume.
2. Students know how to calculate the density of substances (regular and irregular solids and liquids) from measurements of mass and volume.
3. Students know the buoyant force on an object in a fluid is an upward force equal to the weight of the fluid the object has displaced.
4. Students know how to predict whether an object will float or sink.