As part of a global environmental monitoring program, satellite imaging was used to track the shrinking surface area of an inland salt lake over several decades. The estimated surface areas are recorded below:
Calculate how many times larger the surface area of the salt lake was in 1980 compared to in 2020.
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.