GCSE Biology - How to convert between nm, um, mm, m and km (2026/27 exams)

Опубликовано: 02 Май 2026
на канале: Cognito

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** WHAT'S COVERED **
1. Units of length (km, m, mm, µm, nm).
The 1000x factor relationship between adjacent metric units.
2. Converting between different units of length.
Rules for converting to larger units (division).
Rules for converting to smaller units (multiplication).
Performing multi-step conversions across several units.
Expressing results in standard form.
3. Understanding the scale of different units.
4. Incorporating centimetres (cm) into conversions.
Converting between cm, mm, and m.
Strategy for converting values in cm to other metric units.

** EXAM BOARD INFO **
AQA - Suitable for everyone
IGCSE Edexcel - Suitable for everyone
Edexcel - Suitable for everyone
OCR 21st Century - Suitable for everyone
OCR Gateway - Suitable for everyone
CIE - Suitable for everyone

** CHAPTERS **
0:00 Intro & Units of Length Scale
0:34 Factors Between Units (x1000)
0:53 Converting to Larger Units (Dividing)
2:01 Converting to Smaller Units (Multiplying)
2:40 Multi-Step Conversions
3:22 Scale & Size Examples
4:10 Limits of Vision & Microscopes
4:51 Using Centimetres (cm)
5:30 Example: Converting cm to nm

** PLAYLISTS **
   • GCSE Maths (9-1)

   • GCSE Biology (9-1)

   • GCSE Chemistry (9-1)

   • GCSE Physics (9-1)

   • A-Level Biology

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