Friday, March 16th
Today in science: Students were introduced to the scuba diving raisins investigation today. This investigation involved putting raisins (dried grapes) into a beaker filled with a carbonated beverage (in this case Sprite cola). Students were asked not only to make predictions as to what the behavior of the raisins would be once put into the Sprite, but also to write a description of what they actually saw once the raisins had spent some time in the liquid. At the end of the period, after a brief discussion about the mass of the raisin, liquid, and gas molecules, Dr. M asked students to try and explain why the raisins had not simply stayed on the bottom of the beaker.
Homework: Those students who were not able to complete Thursday’s homework should do so for Monday.
Thursday, March 15th
Today in science: After creating a new data table for Trial 2 of the cola experiment, students were asked to set up and complete the trial. In this 2nd trial, we attempted to standardize it by asking all eight students present in today’s class to use the same size beaker (500 mL) and the same amount of cola (approx. 250 mL). One difference between Trial 1 and Trial 2, however, is that we switched cola brands. In Trial 1, we tested Coop’s Cola Zero (Prix Garantie), but in Trial 2 we tested Coca-Cola brand cola.
Homework: Students have been asked to create a line graph of their data from Trial 2 of the cola investigation, print a single copy of it, and then bring it to Friday’s science class (it does NOT have to be printed in color). The title, axes labels, source, and data used in this graph is almost identical to the graph of the Trial 1 data (see the Monday, March 12th entry below). If students wish to create their line graph with a program besides the one we used in class (Create a Graph)–or draw it by hand, if necessary–they have been permission to do so.
Wednesday, March 14th
Today in science: Dr. M asked students to produce the paper copies of Monday’s graph and begin writing a series of descriptive sentences based on the lines seen within their graph. Students practiced using descriptive words such as “increase,” “decrease,” and “remain constant.” After writing the descriptive sentences, students were then asked to write a summary sentence describing the final result of Trial 1. This sentence had to describe what happened to the overall mass of the cola during the trial. Students were then asked to write an additional explanatory sentence that began with the phrase, “This means that…” and included words and/or phrases such as “mass,” “molecules,” “liquid,” “gas,” “cola,” and “carbon dioxide.” Towards the end of the period, we began discussing what we might do differently in trial 2, which is scheduled for tomorrow’s class.
Homework: There is no science homework tonight.
Tuesday, March 13th
Today in science: H period science class does not meet on Tuesdays.
Monday, March 12th
Today in science: With the help of the (free) online Create a Graph program in class today, students were shown how to make a line graph of their “mass” data from last Friday’s experiment. Skills included giving the line graph a proper title, labelling the X- and Y-axes, communicating a “source” of the data, and entering both the “mass” and “time” data. In Wednesday’s class, we will be analyzing the printed line graphs (see Homework assignment below).
Homework: Students have been asked to print a single copy (it does NOT have to be printed in color) of the graph they created with Dr. Merritt in Monday’s science class. Students should bring their printed copy to Wednesday’s science class.
For EXTRA CREDIT, Dr. Merritt has challenged students to use the Create a Graph program again to create a 2nd graph. In this graph, students should again put “TIME (min)” on the X-axis, but this time put “TEMPERATURE (degrees C)” on the Y-axis. If the graph is created correctly, including a good title, bringing a printed copy of this 2nd graph to Wednesday’s class can earn students as many as 5 extra credit points.