DP Biology (first assessment 2025)

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Question 19M.2.SL.TZ1.14a

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.2.SL.TZ1.14a
Level SL Paper 2 Time zone TZ1
Command term Describe Question number a Adapted from N/A
a.
[Maximum mark: 2]
19M.2.SL.TZ1.14a
(a)

Describe the relationship between rock phosphate production and world population. 

[2]

Markscheme

a. as population increases so does phosphate production/positive correlation ✔

b. since 1985 phosphate production has not risen while population has continued to increase ✔

Examiners report

Many candidates were able to score 1 mark here for seeing the positive correlation. However, students continue to have problems determining when changes shown on graphs are significant. Although the final mark scheme allowed for credit to be given if a student wrote that the phosphate levels off/fluctuates/drops and rises while population has continued to increase, many candidates were still unable to draw correct conclusions about the final years shown on the graph.

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