Cover test tubes with foil or rubber bungs to prevent evaporation loss.
Your drawing should occupy at least half to two-thirds of the available space provided on the page.
Look across the scale to find another point where two lines align perfectly.
Step 1: Align the eyepiece graticule with the stage micrometer. biology 9700 practical notes
: Always include units in the column headings only (e.g., "Time / s"), not within the data cells. : Ensure the independent variable is on the x-axis and the dependent variable
Practical investigations often focus on topics like enzyme activity, cell membranes, and plant transport. :
of solution from Tube 1 and transfer it to Tube 2. Mix thoroughly. (Tube 2 is now 5%). cm3c m cubed Cover test tubes with foil or rubber bungs
No practical equipment here. Just a pen, a calculator, and your wits. This paper is about and experimental design.
±0.5∘Cplus or minus 0.5 raised to the composed with power C
All numbers in a column must be recorded to the same degree of precision (e.g., if one reading is 15.0, they should all have one decimal place). Structure: Step 1: Align the eyepiece graticule with the
practical exam requires more than just knowing theory; it demands precise laboratory skills, accurate data recording, and the ability to evaluate experimental results critically. This guide outlines the essential components and tips for acing Paper 3 (AS Level) and Paper 5 (A Level Planning and Evaluation). 1. Master Biological Drawings
Use Spearman's to find a correlation between non-normally distributed or ordinal ranked data. Interpreting Significance and Probability ( The Critical Boundary (
1timethe fraction with numerator 1 and denominator time end-fraction
When asked to "Design an experiment," use the mnemonic:
Draw a smooth curve or a straight line through the points. If you are unsure of the trend, join the points dot-to-dot with straight, ruled lines. Never extrapolate the line beyond your first or last data point unless explicitly instructed. 6. Identifying Sources of Error and Improvements