Unit 3: Density and Buoyancy Collaborative Wiki

In this unit we have foused mainly on BOUYANCY and DENSITY. We concore finding density by find what the mass is Mass=weighing it. And the volume Volume=LxWxH or for irregular objects water displacement. Once you find out what the mass and volume are you divide them and that tell's you what your density is.

D=M/V

V=M/D

and

M=VxD

For the bouyancy you weigh the object you are about to place in the water then after you put it in the water, water will come out of the tube that you filled with exactly the correct amount of water, (You do that by filling up the bottle and then waiting for all of the extra water to come out of the tube). And then when all the water has come out from the object you put in the water and then you weight that and subtract the amount of the container. After you have done so you must subtract the weight of the object and water  to get your final answer and your net force. When we were doing our packets we also had to find out why the object sunk or floated.

The people in our group is Kelly, Taylor, Jessica, and Mattelyn.

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.