After an outdoor event, a gardener surveys a lawn to estimate the area of bare soil. Each quadrat is divided into 100 equal squares. The table shows the number of squares in which bare soil covers more than half of the square.
| Quadrat | Squares with bare soil |
|---|---|
| 1 | 17 |
| 2 | 23 |
| 3 | 14 |
| 4 | 26 |
| 5 | 20 |
The area of the lawn is 160 m2.
Calculate the estimated area of the lawn covered by bare soil.
109 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.