Change to Straight BOL
Pro Version

Biology 9700 Practical Notes //free\\ May 2026

Random: Difficulty in judging a color change (end-point). Use a colorimeter or a standard color chart to improve this. 💡 Quick Tips for Exam Day

Contamination is the number one cause of "weird" results. Check your units: Are you measuring in cm3c m cubed mm3m m cubed ? Converting correctly is vital. biology 9700 practical notes

How you record your findings is just as important as the experiment itself. 📝 Tables Draw your table you start the experiment. The independent variable goes in the left column . Include headings with units (e.g., ). Do not put units in the body cells. Ensure all readings have the same number of decimal places. 📊 Graphs Random: Difficulty in judging a color change (end-point)

Join points with straight lines (ruled) unless a "best-fit" line is specifically requested. Circle outliers if they are clearly anomalous. ⚠️ Identifying Variables and Errors You will be asked to critique your experiment. Be specific. Check your units: Are you measuring in cm3c

Mix sample with ethanol, then add water. Positive result: Cloudy white emulsion. 📉 Core Skill 3: Data Presentation and Analysis

Add Biuret reagent. Positive result: Blue → Purple/Violet.