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Year 11 · 2017 syllabus · Module 1 pilot

Planning a safe, valid method — Evaluate worksheet

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

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Name: __________________________ Date: ______________

Question 1

Write a six-step method for a paper-spinner comparison that another group could follow.

Question 2

An experiment gives the same value every time because the timer rounds to whole seconds. Evaluate reliability evidence.

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. Credit stated construction/length values, comparable paper/folding, marked reachable height, defined timing endpoints, repeated/randomised trials and transparent recording/invalid-trial rule, with a clear drop zone.
  2. Apparent agreement may reflect coarse resolution rather than true repeatability. Use a tool suited to the short interval and report its resolution before claiming dependable timing.