Predicted Time v Temperature Graphs
We've noticed that as we heat water, it initially heats rapidly but then stops rising as much as we approach 100℃. So I predicted a time-Temperature (t,T) graph like the top one.
We expect the water to cool as we turn off the hot plate, so I predicted a downward sloping line on this graph.
Note that upward sloping and downward sloping indicate directional change in the temperature- upward sloping means it's getting hotter, downward sloping means it's getting colder.
Students can compare their actual data to these predictions
Predicted Time v Temperature Graphs
We've noticed that as we heat water, it initially heats rapidly but then stops rising as much as we approach 100℃. So I predicted a time-Temperature (t,T) graph like the top one.
We expect the water to cool as we turn off the hot plate, so I predicted a downward sloping line on this graph.
Note that upward sloping and downward sloping indicate directional change in the temperature- upward sloping means it's getting hotter, downward sloping means it's getting colder.
Students can compare their actual data to these predictions