Biology 9700 Practical Notes ~repack~ Jun 2026

Remove, gently blot dry with a paper towel to remove excess surface water, and record the final mass or length. Calculate the percentage change in mass:

In water baths, temperatures can fluctuate. Fix: Use a thermostatically controlled water bath. biology 9700 practical notes

Use a sharp pencil. Points must be plotted accurately as small crosses ( Remove, gently blot dry with a paper towel

V1=2%×10 cm310%=2 cm3 of stock solutioncap V sub 1 equals the fraction with numerator 2 % cross 10 cm cubed and denominator 10 % end-fraction equals 2 cm cubed of stock solution of distilled water to reach the target volume. Use a sharp pencil

Examiners heavily penalize students who confuse "errors" with "mistakes." A mistake is spilling a solution. An error is an inherent limitation of the apparatus or procedure. Calculating Percentage Uncertainty

: Diluting a solution step-by-step by the same factor (e.g., 10x each time). 2. Biological Drawings & Microscopy

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.