Learning+Task+2

=Learning Task 2 - Buoyant forces lab=

** __Key Terms:__ **
== · ** Buoyancy ** is a force that acts upward, opposite gravitational force of the floating object. It is ** // equal in magnitude // ** to the weight of the object (or volume of water displaced). Its ** // line of action // ** is through the center of the volume that is causing the water displacement. ==

==** Part 1 **: Fill both containers with water (to the same level). Drop one item that floats into one of the bottles, and one item that sinks into the other bottle. Discuss the results as you repeat these steps, always starting with equal water levels.==

==Drop the items that have been weighed into the bottle and let the water overflow into the dish. Be sure to use all water balloons, several objects that sink, larger floating objects, and those that will partially float.==

==**Part 3:** Have the students construct graphs of the weights of the objects and the weights of the water displaced. The objects that float will cluster near one end of the graph, while the objects that sink will cluster near the other end. The water balloons will create a 45 degree line up the center of the graph.==