Arbeitsblatt: The scientific method

Prac%cal The scien%fic method The scien)fic method Biology is an empirical science, meaning it gains its knowledge from comprehensible experiences as well as describable and measurable observa%ons or experiments. Learning objec-ves: o o You can recapitulate the typical steps of the scien%fic method. You perform an experiment independently. You apply theore%cal knowledge to analyse and cri%cally discuss your experimental results. You write short lab report. Assignment 1: Overview of the scien-fic method Material: Worksheet on OneNote (‘Theory_The scien%fic method) Tasks: 1. Read the theore%cal background (‘Theory_The scien%fic method) on the worksheet and study figure 1. 2. Use the theore%cal background to solve the problems on p. 2. Assignment 2: Transpira-on experiment Material: 4 glass jars, 4 cherry laurel branches, Vaseline, 1 measuring cylinder, water, oil, adhesive tape, pen Procedure: 1. With pen and adhesive tape, label your four glass jars with – and your group name. 2. Use the measuring cylinder to measure 150 ml of water and add the water to one glass jar. 3. Repeat step 2 with all glass jars. 4. Place cherry laurel branch onto piece of kitchen paper. Smear thin layer of Vaseline all over the upper surface of the leaves. Place this cuXng in glass A. 5. Place the second cherry laurel branch onto piece of kitchen paper. Smear thin layer of Vaseline all over the lower surface of the leaves. Place this cuXng in glass B. 6. Place cherry laurel branch onto piece of kitchen paper. Smear thin layer of Vaseline all over the upper and lower surface of the leaves. Place this cuXng in glass C. 7. Place the last cherry laurel branch directly into glass without any Vaseline. 8. Place the glasses with your branches back into the orange box and leave them for two weeks. They will be kept in place where they will not receive direct sunlight. Fig. 1. Experimental set-up. 1 Prac%cal The scien%fic method Results and conclusions: 1. Take your four jars to your workspace. 2. Remove the cherry laurel branches from your glass jars. 3. Carefully transfer the liquid (water and oil) of one glass jar into measuring cylinder. 4. Read the volume and note it into the table below. 5. Repeat steps 3 and 4 with all other glass jars. 6. Use the excel sheet ‘results_transpira%on provided on OneNote to draw graph of your results. 7. Use your results to finish the short lab report that has par%ally been prepared. Proceed as follows: a. Read the handout ‘How to write lab report provided on OneNote. b. Read the chapter ‘introduc%on of the prepared lab report. c. Write the chapter ‘materials and method according to the rules of scien%fic wri%ng. d. Write the chapter results according to the rules of scien%fic wri%ng. e. Write the chapter discussion according to the rules of scien%fic wri%ng. Glass jar Day 0 (t 0) Day 14 (t 14 d) Date: Date: B D 2