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Edexcel A-Level Biology A2 A 1 8 Order of Magnitude Calculations Questions

Review A-Level Edexcel Biology order-of-magnitude calculations through microscope images, scale bars, unit conversions and standard-form answers.

Syllabus
Pearson Edexcel International Advanced Subsidiary/Advanced Level
Course
Biology XBI11/YBI11
Level
A2

Exam points

  • calculate magnification from microscope images using scale bars and unit conversions
  • give biological size or magnification answers in standard form or significant figures
  • work backwards from magnification to actual cell, organelle or tissue dimensions

Edexcel A-Level Biology A2 A 1 8 Order of Magnitude Calculations Questions question 1

[Maximum number: 1]

Soil contains many types of organisms such as earthworms.

The photograph shows earthworms collected from the soil of a pineapple plantation in North East India.

Figure for Question Edexcel A-Level Biology A2 A 1 8 Order of Magnitude Calculations Questions question 1 — Edexcel A-Level Biology A2
Figure for Question Edexcel A-Level Biology A2 A 1 8 Order of Magnitude Calculations Questions question 1 — Edexcel A-Level Biology A2
Figure for Question Edexcel A-Level Biology A2 A 1 8 Order of Magnitude Calculations Questions question 1 — Edexcel A-Level Biology A2

The actual earthworm labelled A in the photograph is 13.5 cm long. Estimate the magnification of this photograph.

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