Biology uses metric units such as millimetres, micrometres and nanometres for tiny structures.
SI prefixes: milli (10^-3), micro (10^-6), nano (10^-9). Use appropriate instruments and note uncertainty (±). Significant figures reflect precision.
Choose instruments suited to the scale: ruler, caliper, micrometer, balance. Calibrate where needed. Report uncertainty and units.
Key idea: 1 µm = 1000 nm.
Biology uses metric units such as millimetres, micrometres and nanometres for tiny structures.
Measuring and Units is one of the 51 topics in Lab Methods & Biostatistics. It is rated Beginner, so it suits learners who are starting out in biology. Related topics in this area include Tables and Graphs, Scale Bars and Calculations, Mean, Median and Mode.
A typical animal cell is about 20 µm, a virus about 100 nm.
Measuring and Units is a Beginner topic, so no earlier topic is required. Other Beginner topics in Lab Methods & Biostatistics that pair well with it include Scientific Method, Hypothesis, Variables.
The closest topics to Measuring and Units are Tables and Graphs, Scale Bars and Calculations, Mean, Median and Mode, Colorimetry. Comparing them side by side is a good way to see how the ideas connect.
Read the summary and the in-depth section, then use the quick check on the interactive lesson for Measuring and Units. To practise the whole of Lab Methods & Biostatistics, use the Lab Methods & Biostatistics quiz.
Measuring and Units: Biology uses metric units such as millimetres, micrometres and nanometres for tiny structures. Tables and Graphs: Data are recorded in tables and plotted as line graphs, bar charts and scatter plots. Read both side by side and note what each one explains.
First, read the summary and write the definition in your own words. Second, read the in-depth section and note any example. Third, compare it with Tables and Graphs and explain the difference aloud. Finally, take the Lab Methods & Biostatistics quiz and come back to this page for any question you miss.
Data are recorded in tables and plotted as line graphs, bar charts and scatter plots.
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