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Explain the importance of high biodiversity. Explain what is meant by a self-supporting ecosystem Homework quiz Slideshow Video Year 11 Term 1 73/74 8.2 Changing abiotic factors Identify abiotic factors that affect ecosystems. Explain changes in the distribution of species in an ecosystem. Describe stable and unstable populations. 4.7.1.2; 4.7.2.1 Worksheets 8.2.1, 8.2.2 and 8.2.3; Practical sheets 8.2.1 and 8.2.2; Technician’s notes 8.2 Quick starter Homework worksheet Homework quiz Slideshow Year 11 Term 1 75/76 8.3 Investigating relationships Describe how changes in one population affect another. Explain interdependent relationships. Explain how predator–prey population cycles have cyclical changes. 4.7.2.1 Worksheets 8.3.1 and 8.3.2; Practical sheet 8.3; Technician’s notes 8.3 starter Homework worksheet Homework quiz Year 11 Term 1 75/76 8.6 Competing for resources Describe how competition impacts on populations. Explain why animals in the same habitat are in competition. Explain interspecific and intraspecific competition. 4.7.1.1 Worksheets 8.6.1, 8.6.2 and 8.6.3 starter Homework worksheet Homework quiz Slideshow Year 11 Term 1 77/78 8.7 Required practical: Measure the population size of a common species in a habitat Describe a suitable method to investigate a population. Estimate the size of a population. 4.7.2.1 Worksheet 8.7; Practical sheet 8.7; Technician’s notes 8.7 Quick starter Homework worksheet Homework quiz Slideshow