Students observe, identify and describe the relationship between the depth of liquid in a vessel and the shape of the vessel when it is being filled at a uniform rate of flow. Graphs (depth of liquid in the vessels against time) are used to represent the relationships between depth and vessel shape.
- Students predict either the shape of the graph that will match the depth of liquid flowing into a glass, or predict the shape of the glass which matches a graph of filling rate.
- Students observe how the shape and slope of a graph can be linked to physical attributes of objects.
- Feedback about the relationship between the graphs and glasses is provided after each selection.
Filling glasses: graphing and comparing
Filling glasses: find the right glass
Filling glasses: find the right graph
Filling glasses: create the right glass
Filling glasses: create the right graph