Biology 9700 Practical Notes Exclusive

Explicitly state the independent variable (with 5 chosen concentrations), the dependent variable (how and when it is measured), and at least three critical variables to keep constant (with specific methods to control them).

Parallax error when reading volumes. Fix: Ensure eyes are level with the bottom of the meniscus. 4. High-Yield Exam Day Tips biology 9700 practical notes

"Why is your percentage change calculation negative?" A: "A negative percentage change indicates a decrease in mass/length due to water loss (osmosis) or respiration." Explicitly state the independent variable (with 5 chosen

Be ready to distinguish between systematic errors (instrumental) and random errors (human/procedural). Common improvements include using more precise equipment (e.g., a colorimeter) or increasing the number of intermediate concentrations. Recommended Revision Resources identify positive/negative results

Biochemical tests are a staple of Paper 3. You must know how to perform them, identify positive/negative results, and understand the underlying science. Benedict’s Test for Reducing Sugars Glucose, fructose, maltose, galactose.