(3rd ed.) Page 1 BIO 100 LAB SIGN OFF PAGE - UNIT 1 Name ___________________________ Please staple all of your lab pages for this Unit together with this page as the top. You will use this page to get your Labs for Unit 1 signed off by the Biology Learning Center staff. You need to have all of the following steps initialed by a staff member before you will be allowed to take the Unit 1 Exam. After you have obtained all of your sign offs for this Unit, be sure that a BLC staff member indicates on your Lab Card that you are OK to take the Unit 1 Exam. Also, keep this sign off page, along with your completed lab worksheets, as proof of your lab completion. If your Lab Card indicates that you have not completed the required Labs for this Unit, and you feel that you have, it is up to you to provide proof that you have indeed done the Labs. Keep this page! ___________ Unit 1, Step 2A (The Black Box: Observations, Question, Hypothesis) ___________ Unit 1, Step 2B (The Black Box: Digital Scale Weight Test) ___________ Unit 1, Step 2C (The Black Box: Water Bath Test and Conclusions; show your clean, dry white film cannisters to the staff member) *BLC Staff: After the student receives his/her last initial on this page, please record that he/she has completed the required lab signoffs for this unit.(3rd ed.) Page 2 NOTE: DO NOT ATTEMPT ANY OF THESE LABS UNTIL AFTER YOU HAVE READ THE TEXTBOOK CHAPTER AND VIEWED THE CORRESPONDING STUDY GUIDE! THEY PROVIDE THE NECESSARY BACKGROUND INFORMATION. Unit 1, STEP 2: “The Black Box: An Introduction to the Scientific Method” lab This lab must be done in the Biology Learning Center. The instructions are located in Unit 1, Step 2, of the BIO 100 Course Website. As you complete each part of the lab, take your results to the front desk in the Biology Learning Center for a sign off (you will be prompted when to do so). To begin, go to Biology 100 Course Website, click on the Unit 1 link on the Course Content page, scroll down to find Step 2, and then click on the link to “The Black Box” lab instructions. Follow the instructions on the website and fill in all of the required information on your worksheets (below) as you complete the lab. Note: you will be working at a computer station in the BLC with instructions on the computer screen in front of you, so there is no need to print out the lab instructions from the website. (You only need to print these lab worksheets) Step 2, Part A I. OBSERVATIONS: 1. Using your sense of vision, describe the similarities and differences among the objects. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ 2. Using your sense of hearing and touch (by shaking the objects in the containers), describe the similarities and differences among the objects and your unknown container. ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________(3rd ed.) Page 3 ______________________________________________________________________________ ______________________________________________________________________________ 3. Do any of the known objects seem to match your UNKNOWN based on hearing / touch (shaking the containers)? If yes, which one(s)? ______________________________________________________________________________ ______________________________________________________________________________ II. QUESTION: ______________________________________________________________ ? III. HYPOTHESIS: I hypothesize that the UNKNOWN “black box” contains a _______________________ , and thus, does not contain a ________________________ , _______________________ , ______________________ , or _______________________ . 4. What type of reasoning was used to form your hypothesis? ___________________ reasoning. TAKE YOUR COMPLETED WORKSHEETS TO THE FRONT DESK FOR A SIGNOFF BY A STAFF MEMBER BEFORE YOU MOVE ON TO PART B. (Unit 1, Step 2A) IV. PREDICTIONS / TESTS: Step 2, Part B Weight Test (Digital Scale) RESULTS Weight of UNKNOWN object and its black container + lid = ________________ g Weight of 1 chocolate chip and extra black container + lid = _________________ g Weight of 1 M&M and extra black container + lid = _________________ g Weight of 1 pinto bean and extra black container + lid = _________________ g Weight of 1 penny and extra black container + lid = _________________ g Weight of 1 black bead and extra black container + lid = _________________ g(3rd ed.) Page 4 5. Do any of the known objects have about the same weight (within + or - 0.10 g) as the UNKNOWN object? If so, which one(s)? Which are different? Write down the names of the objects in their appropriate spaces. Same weight (within + or - 0.10 g) as UNKNOWN = __________________________________ ______________________________________________________________________________ Different weight (at least 0.10 g more or less) than UNKNOWN = ________________________ ______________________________________________________________________________ 6. Can you eliminate any of the items from being in your UNKNOWN container based on the results of the digital scale (weight) test? Which one(s) can you eliminate and not eliminate? Eliminated (not in unknown container) = ________________________________________ ______________________________________________________________________________ Cannot be eliminated (could be in unknown container) = ________________________________ ______________________________________________________________________________ TAKE YOUR COMPLETED WORKSHEETS TO THE FRONT DESK FOR A SIGNOFF BY A STAFF MEMBER BEFORE YOU MOVE ON TO PART C. (Unit 1, Step 2B) Step 2, Part C 65 °C Water Bath Test RESULTS *For each of the following circle either “melted” or “not