Students have seen that solids, which are more dense than a liquid, that sinks in that liquid and solids, which are less dense than a liquid, that floats on that liquid. They use a metal boat to float in water. Pupils comprehend that...

Fourth graders discuss the events involved in the sinking of the Titanic and plot them on a timeline. Focus be on the involvement of Margaret Tobin Brown, Unsinkable Molly Brown.