G6 Week 10 – S2

Last week in science!

Monday, April 1st

Today in science: In their Lab Notebooks, students were asked to prepare a page for a new investigation titled “Practice Dilution.” In part 1 of this investigation, students were asked to put two different liquids into five test tubes according to instructions written on the whiteboard. Just before the end of today’s lesson, students were asked to draw a representation of the molecules of the (dark purple) potassium permanganate chemical found in test tube A, which contained 10 mL of KMnO4 and 0 mL of H2O. Dr. M will check these drawings for accuracy at the start of the next lesson.

Homework: There is no science homework tonight.

Tuesday, April 2nd – No class (Shadow day)

Today in science: —

Homework: —

Wednesday, April 3rd

Today in science: After checking the accuracy of students’ molecule drawing of the liquid in test tube A (100% KMnO4), Dr. M asked students to draw water molecules–as clear circles–in test tubes B, C, D, and E. After transferring 1 mL of KMnO4 from test tube A to test tube B, Dr. M then asked students to alter their test tube B molecule drawing to reflect the presence of the newly introduced KMnO4 molecules. In the next step of the investigation, Dr. M asked students to transfer 1 mL of KMnO4 from test tube B to test tube C. He then asked students to alter their test tube C molecule drawing to reflect the presence of the newly introduced KMnO4 molecules. The same instructions were given when then transferring 1 mL of KMnO4 from test tube C to test tube D, and then from test tube D to test tube E. With every new transfer, Dr. M asked students to alter their existing molecule drawings. At the end of the investigation, Dr. M asked student to record some additional notes underneath their drawings.

Homework: There is no science homework tonight.

Thursday, April 4th

Today in science: Today’s dilution ‘challenge’ involved students trying to figure out, with the help of yesterday’s 5-step serial dilution and basic arithmetic, how to perform a 10-step serial dilution. The work students were asked to do on a piece of graphing paper can be seen in the Notes Portal. At the end of the lesson, Dr. M explained to students how (and why) serial dilutions are used by scientists, but especially by medical researchers, by providing an example that involved cancer and cancer (tumor) treatment.

Homework: There is no science homework this weekend.

Friday, April 5th

Today in science: Unfortunately, A period science does not meet on Fridays. 😦

Homework: —

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