Experimental skills
Practical skills
- Planningindependent and dependent variableskeep variables constantcontrol experimentfive values, three repeats
- Results tablestime / sno units in bodysame decimal placespercentage change
- Graphs and chartsindependent variable on x-axismore than half the grid× or ⊙, best-fit linehistogram bars touch
- Biological drawingssharp pencil, no shadingruled label lines touchingimage size ÷ actual sizemeasure in mm
- Evaluatinganomalous resultsrepeats and meansources of errorspecific improvements
- Indicators and testslimewater: milkyhydrogencarbonate: yellow, red, purpleuniversal indicator: pHlitmus: red acid, blue alkali
- Samplingrandom coordinateslarge sample sizeavoid biasrepresentative