We continued our study of polarity, this time exploring how the polarity of molecules might impact our ability to smell the molecule. Through the Lesson 45 PowerPoint, students learned that polar molecules are more likely to be detected by the nose as something with a scent although there are still polar molecules (like water) that do not smell. Students worked in pairs to cut out the molecules in the molecules handout and used the molecules to complete the Lesson 45 Worksheet. Students who would like to explore the polarity of molecules further are encouraged to visit the University of Colorado’s PhET molecule polarity simulation (or just click below).
For our entry task today, students assembled into their dissection groups, quickly assigned each other a number (1, 2, or 3) and then were assigned every third question on the worksheet (page 1 only). The entry task video is below and helps connect the work we have completed this far in Unit 1 (cells and organelles) and Unit 2 (body systems), with a preview of what is to come.
Dissections have arrived! We will begin by review the contents of the dissection kit each team will use, and we will review the safety precautions for conducting the lab. Next, students will assemble into three-person teams and determine who will take the lead for dissection the cow eye, pig heart, and frog. In addition, two teams will also receive a sheep brain. As preparation for the dissections, students will use the Chromebooks to watch their assigned how-to video (below) and carefully take notes:
Cow Eye Dissection:
Pig Heart Dissection:
Sheep Brain Dissection: