International A Level Biology / Practical Skills in Biology I

Drawing and reading graphs revision notes

Edexcel International A Level Biology (YBI11), chapter 13: Practical Skills in Biology I, specification point U3.3, A.3.2, A.3.5. Part of the full course.

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Choosing the right graph and setting it up carefully can earn marks before you interpret the results. A gradient shows how quickly one variable changes with another, so it needs the correct calculation, unit and sign.

More lessons in Practical Skills in Biology I

• Variables, controls and a fair test
• Planning an experiment for Unit 3
• Accuracy, precision, validity and repeatability
• Significant figures, units and results tables
• Evaluating results and suggesting improvements
• Percentage change, ratios and rates
• Mean, range, standard deviation and error bars