Year 11 · 2017 syllabus · Module 1 pilot
Tools extend and limit observation — Evaluate worksheet
Original practice. Write explanations that distinguish observations, evidence and claims.
Name: __________________________ Date: ______________
Question 1
Design a fair comparison of two temperature tools in a cooling experiment.
Question 2
A highly magnified blurry image is used to count cells. Evaluate its reliability and suggest improvements.
Teacher answer key — 2 questions
Model responses identify the essential ideas. Accept scientifically correct alternatives that address the question; wording need not match exactly.
- Compare at the same location/time with a suitable reference and comparable response/placement; record repeated readings, sampling rate and calibration. Avoid inferring accuracy from display digits.
- Blur can merge boundaries so counts depend on judgement. Improve focus/resolution, calibrate scale, define counting rules and compare observers; magnification alone cannot recover missing detail.