Be sure to have students collect data for approximately 5 minutes after boiling. Students will use the data to create a graph on their calculator in addition to sketching this graph on paper. The students' graphs can be compared for similarities and differences which could lead to other questions and ideas. The objectives for this lesson are to have the students describe real situations from a variety of graphs. The labeling of the x and y axis is an important factor in understanding the differences between these situations, as to their individual meanings.
Students write a story which describes a possible situation for each graph.
Then students choose one of the four graphs and attempt to duplicate it using the CBL with a motion sensor. The students will place the bulbs in their predicted order. Be sure all the students agree on this graph before proceeding. Students will then test the light intensity of their setup and graph the results. They will compare their graphs to the predicted graph.