OCR 2023 GCSE Geography A Geographical Themes J383/02: The world around us

2 © OCR 2023 Ecosystems of the Planet 1 (a) Look at the table below, which shows climate data for a hot desert ecosystem. Climate data for a hot desert ecosystem Months Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Rainfall (mm) 6 5 4 2 1 0 0 0 0 1 3 6 Average Temperature (°C) 19 15 (i) State the mode for the rainfall data. ...................................................................................................................................... [1] (ii) Calculate the mean annual rainfall. Give your answer to one decimal place. ...................................................................................................................................... [1] (iii) Identify two features of the climate data which are typical of a hot desert ecosystem. Feature 1 ........................................................................................................................... ........................................................................................................................................... Feature 2 ........................................................................................................................... ........................................................................................................................................... [2] (b) Explain how plants are adapted to the climate of a hot desert ecosystem. ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... .............................................................................................................................................. [4] 3 © OCR 2023 Turn over (c) Explain briefly two threats to the biodiversity of tropical rainforests. Threat 1 .................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... Threat 2 .................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... [4] (d) CASE STUDY Tropical rainforest interdependence Tropical rainforest you have studied: ........................................................................................ Explain the interdependence of climate, soil and plants in tropical rainforest ecosystems. ................................................................................................................................................... ................................................................................................................................................... .....................................................................................................