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Year 11 · 2017 syllabus · Module 1 pilot

Qualitative and quantitative observations — Evaluate worksheet

Original practice. Write explanations that distinguish observations, evidence and claims.

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Name: __________________________ Date: ______________

Question 1

Design a recording protocol for “cloudiness” in three safe supplied water samples.

Question 2

A student turns colour categories pale, medium, dark into 1, 2, 3 and averages them. Evaluate the result.

Teacher answer key — 2 questions

Model responses identify the essential ideas. Accept scientifically correct alternatives that address the question; wording need not match exactly.

  1. Use equal volumes in identical transparent containers, a fixed background target and lighting, a stated visibility/category rule, and repeated independent judgements. Do not taste or handle unknown water.
  2. These are ordered categories but not necessarily equally spaced measurements. A numerical mean can obscure their meaning. Report category counts or use a calibrated physical measurement if required.