We continued our learning from the Google Classroom by focusing on the last question in the worksheet that asked students to consider the effect of temperature on metabolism. We watched the the “squirrel” segment (from 41:40 to 50:00 of the Can We Live Forever? video from NOVA scienceNOW). Students then updated their answers to question 6 from yesterday’s worksheet. The the last half of class, students worked in pairs to complete part 1 of the Keeping a Balance worksheet. They reviewed homeostasis and negative feedback, applying their learning to the scenario of a car adjusting speed in an effort to maintain the set point speed (the speed limit speed of 55 mph).
For today’s lesson, we decided to deviate from Lesson 27 in the textbook because of reagent availability and safety concerns. We began class with a brief video demonstrating the process of electroplating copper metal with zinc metal:
After the video we sketched out the lab setup:
The students then watched a live demonstration before they set up the lab working in groups of four. Because the electroplating takes an hour or so to be clearly observable, the experiments continued to run until 4th period as pictured below along with a picture of the copper we started with:
After setting up the experiments, students watched a video about how electroplating is used in industry: