In this activity, student mix a given quantity of salt with a fixed volume of water. Mass and volume measurements are made before and after mixing to determine if these quantities change. Students observe that mass is conserved during dissolving while volume is not.
Inquiry Focus: How can we plan and build a structure for Our Town that has the base area of 100 units square and incorporates one or more electrical components? Other... read more
Categories: Lab/Student Activity
Students work in small groups to design, build, and test a speedboat powered by a hand-made propeller that pushes air. The boats are raced in a 20-foot length of eavestrough filled with water. A set... read more