Study resource
Key concepts in biology study guide
Review study guide for Key concepts in biology in Edexcel Biology.
At a glance
study guide
Resource type
Topic
Key concepts in biology
Study guide overview
Using Small SI Prefixes and Standard Form in Cell Biology
In cell biology, scientists must measure and compare extremely small structures, making SI prefixes and standard form crucial tools. The main prefixes used to express such tiny values are: milli (m, 10⁻³), micro (µ, 10⁻⁶), nano (n, 10⁻⁹), a
In cell biology, scientists must measure and compare extremely small structures, making SI prefixes and standard form crucial tools. The main prefixes used to express such tiny values are: milli (m, 10⁻³), micro (µ, 10⁻⁶), nano (n, 10⁻⁹), and pico (p, 10⁻¹²). These prefixes represent divisions of a metre: for instance, 1 micrometre (µm) is one-millionth of a metre. Conversions between these units rely on multiplying or dividing by powers of ten. Standard form—scientific notation—further assists by expressing numbers as a × 10ᵇ, where 1 ≤ |a| < 10 and b is an integer. This makes calculations and communication about very small quantities both accurate and efficient.
Ready to practise?
Choose your next step
Use the study guide for understanding, then switch into an active revision mode.
Related topics