Lab Safety and Practical Write-Ups
Key terms and templates for writing markable safety, methods, and conclusions.
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Questions Covered in This Set
10 cards to master
What three parts must a markable safety statement include?
The hazard, the harm/risk it could cause, and the control measure (ideally with a reason).
Give the sentence template for a safety point.
"[Hazard] could cause [harm], so I will [control measure]."
What are the four common hazard categories?
Chemical (corrosive, irritant, toxic, flammable); thermal (hot liquids, flames, hot apparatus); mechanical/physical (glass, falling masses, sharp blades, trailing wires); biological/electrical (microbes, mains near water).
What three columns does a risk assessment table usually have?
Hazard | Risk | Control measure.
What is the 'golden test' for a good method?
Could someone else get your results without asking you a single question?
List features of a method that earn marks.
Exact volumes and concentrations, named apparatus, stated independent variable with a sensible range (about five values), controlled variables, clear start/stop signal, measurement resolution, and repeats.
How should method steps be written?
As numbered imperative steps — short sentences with one action each.
Why include a labelled diagram?
They are cheap, easy marks when apparatus arrangement matters — keep them simple 2D line drawings, not artwork.
How should a results table be set up?
Drawn before you start: independent variable in the first column, then repeat trials, then the mean, with units in headings like Time, t (s).
What do you do with an anomalous result when averaging?
Discard it, then calculate the mean from the remaining repeats.
