Designing a Biology Investigation — Drills · Grade 10 Science
Chapter: Investigating the Chemistry of LifeWhat these drills covers
By the end of Designing a Biology Investigation you should be able to:
- I can identify an independent variable, an outcome, and useful controls.
- I can interpret repeated measurements without claiming more than the evidence supports.
2 questions, written answer, each with a worked explanation.
Vocabulary used: independent variable, replicate, confounding variable.
Problem 1
Describe one fair comparison for investigating enzymes.
Answer and explanation
Compare equal enzyme and substrate amounts at different temperatures while holding pH and time constant; measure product per time using independent replicates.
Problem 2
A plant experiment changes both light and fertilizer. Why is a growth difference hard to interpret?
Answer and explanation
Either factor or their interaction could contribute. Change one factor with the other controlled, or use a planned factorial comparison.