For our final lab of the school year, students worked together to calculate the amount of carbon dioxide exhaled in a given period of time. The lab brings together our study of color and pH (purple cabbage juice indicator) and our study of global warming and climate change from the end of our previous unit. Students will balance equations, calculate moles of carbon dioxide produced per minute, and calculate how many pounds of carbon dioxide the average person exhales each day. Students will complete the Lesson 88 Handout, which includes instructions for writing a lab report.
For the second day of this lesson, we began with a video describing the effect of ocean acidification on oyster larvae in the Pacific Northwest:
The video presents a dire vision of our future if ocean acidification is ignored. As scientists, we know there is always a solution out there, and to that end we watched the second part of this video series titled Solutions.
The remainder of class was used to work through the Lesson 88 handout. Notes from class are pictured below:
Note: There are numerous sources of potential error in our experiment. When interpreting results, it is important to also consider whether other scientists have conducted similar experiments or have conducted experiments designed to discover the same endpoint (how much carbon dioxide a person exhales in one day). For example, using a different experimental approach, globe.gov estimates the average human actually exhales 0.9 kg (about 2 pounds) of carbon dioxide per day!
Whiteboard notes from June 14:
- Read Lesson 88 in the textbook and complete the exercises assigned in the work packet. Login via hs.saplinglearning.com and enter your username and password:
- Username: wahps****s-####### (**** = first 4 letters of your last name and ####### = student number). Remember to include the dash between s and #.
- Password: S-####### (the S must be capitalized)
- Please ask questions about anything from Lesson 88 you do not yet fully understand.
Opportunities For Help Outside of Class:
- Mr. Swart’s office hours: Mondays, Tuesdays, and Thursdays after school until at least 3:00 (later with advanced notice)
- Use the vast number of resources available on this website – check each lesson!
- Email Mr. Swart for help if staying after school is not possible
- Form a study group with other students to review concepts from class
- Attend MASH after school (M/T/Th in Library)
- Attend Math Lab after school (T/Th in Room 124)