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6.1 Monitoring and maintaining the environment

6.1 Monitoring and maintaining the environment

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Question 1

In many tropical regions, the population of sea turtles is decreasing.

The table below shows how the population size of a specific sea turtle species has changed over time.

Year198020002020
Population size1.2 million700,000450,000
a.

Calculate the percentage decrease in the population size between 1980 and 2020. Give your answer to 2 significant figures.

[3]
b.

Which of the following is the best description for how the population of sea turtles changed between 1980 and 2020?

  • Dropping at a decreasing rate
  • Dropping at a steady rate
  • Dropping at an increasing rate
[2]
Markscheme

6.1 Monitoring and maintaining the environment Questions

  1. GCSE
  2. /Biology
  3. /6.1 Monitoring and maintaining the environment

25 exam-style questions on OCR GCSE Biology 6.1 Monitoring and maintaining the environment, covering 6.1.1 Field investigation of distribution and abundance, 6.1.2 Human interactions and biodiversity, 6.1.3 Maintaining biodiversity, and 6.1.4 Environmental change and distribution of organisms. Each one has a worked solution and a mark scheme showing where the marks go.

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