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Brainlag Learn / GCSE Biology

Required practicals and maths skills

The skills behind every biology practical: units and magnification, means and percentages, rates and graphs, sampling, ratios and planning.

Lessons

  1. Units and magnificationmm, μm and nm, standard form, magnification, scale bars and the two kinds of microscope. 20 min, free
  2. Means, percentages and uncertaintyMeans, anomalies, ranges, percentage change and percentages of a total, and naming variables. 20 min, free
  3. Rates and graphsRates per minute and 1000 ÷ time, gradients, reading an optimum and an intercept, and choosing a chart. 20 min, Plus
  4. Sampling and estimatesRandom quadrats, transects, population estimates, capture-recapture and efficiency of biomass transfer. 20 min, Plus
  5. Ratios and probabilitySurface area to volume ratios, Punnett-square probabilities, expected numbers, doubling bacteria, BMI and correlation. 20 min, Plus
  6. Required practicals reviewWhat each biology required practical does, food test colours, hazards, improvements and planning. 20 min, Plus

Practise and test

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