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IB ESS SL 2.1.16 Quadrat Sampling Questions

Practise IB ESS SL 2.1.16 by selecting quadrat sites, measuring vegetation and estimating abundance, frequency and percentage cover.

Syllabus
First assessment 2026
Course
ESS SL
Level
SL

Exam points

  • design representative quadrat sampling for non-mobile organisms using random or systematic site selection
  • measure percentage cover, frequency, abundance or density within quadrats and compare estimates
  • improve reliability by repeating quadrats, standardising measurements and using sufficient sample size
  • use quadrat results to determine invasive-species impacts or vegetation change along an environmental gradient

IB ESS SL 2.1.16 Quadrat Sampling Questions question 1

[Maximum number: 3]
Figure 4(c): An example of a retreating glacier in the Swiss Alps, 1891 (left) and 2019 (right)

Figure:An example of a retreating glacier in the Swiss Alps, 1891 (left) and 2019 (right)

Figure 4(d): Average percent cover vegetation near a glacier

Figure:Average percent cover vegetation near a glacier

Describe a method used to collect the data on percent cover vegetation shown in Figure 4(d).

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