ow":[{"id":"df4f1e22-b108-4df3-9b85-ea76531a2a35","revisionId":"f3413a3a-f097-436a-9497-4b604eb21e45","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"medium","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"ffbaa17b-9406-4f7d-a3bf-62dd715b1a83","label":null,"content":"Outline one reason for the distribution of hot deserts.","markscheme":"- Identifies a valid geographical factor or process, e.g., high-pressure belts around $30^\\circ$ N/S of the equator, rain-shadow areas, or continental interiors B1\n- Provides a developed explanation of how this factor leads to dry conditions, e.g., sinking air prevents condensation/cloud formation, winds lose moisture over mountains, or distance from the ocean prevents moisture-bearing winds from reaching B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"dfabfbcd-dc80-4255-a3f1-6ca04595eadd","revisionId":"9e3bf134-2c15-49be-86f5-f591c0ab4c0c","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"medium","totalMarks":2,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"a32b8530-2190-47cf-8c2e-d94a859e1286","label":null,"content":"Outline one reason why hot deserts have low levels of biodiversity.","markscheme":"- Identifies a valid reason for low biodiversity in hot deserts, such as extreme aridity/water scarcity, temperature extremes, or nutrient-poor soils B1\n- Develops this point to explain how it limits biodiversity, e.g., only highly specialised species can survive, or limited plant growth restricts the food web/species richness B1","marks":2,"order":0,"markingRubric":null,"explanation":null,"options":[]}],"options":[],"explanation":null,"firstAttemptFullMarks":null},{"id":"fdabfafd-19d4-402c-b835-b011b2fe76ec","revisionId":"b2f05995-45e3-4c67-849b-6ab97a0c65fb","questionNumber":null,"questionType":"LA","specification":"","difficulty":3,"difficultyBand":"medium","totalMarks":4,"sourceTitle":null,"calculatorUse":null,"parts":[{"id":"e11df927-b121-43c5-a22a-776151bd1b67","label":null,"content":"Study **Figure 1**, which shows the global distribution of major hot desert ecosystems.\n\n![Figure 1: Global distribution of hot deserts](https://assets.mathsgenie.co.uk/aqa-qb/4ce0a010-aab0-4ce8-8103-1808c84d443c.png)\n\nUsing **Figure 1**, describe the global distribution of hot deserts.","markscheme":"- Identifies that hot deserts are primarily concentrated in two distinct bands or belts north and south of the equator, specifically near the Tropic of Cancer ($23.5^{\\circ}$ N) and the Tropic of Capricorn ($23.5^{\\circ}$ S) B1\n- Notes that hot deserts are frequently located on the western margins or coastlines of continents (for example, the Atacama Desert on the west coast of South America or deserts in western Australia) B1\n- Identifies that the largest continuous mass of hot deserts is located across North Africa (the Sahara) and into the Middle East (the Arabian Desert) B1\n- Observes that hot deserts are completely absent along the Equator ($0^{\\circ}$) and in high-latitude/polar regions B1","marks":4,"order":0,"markingRubric":null,"explanation":{"methods":[{"id":"describe_distribution","label":"Describe the distribution","steps":[{"type":"text","order":0,"title":"Identify the desert belts","content":"Start with the broadest pattern: scan the latitude lines, then state that hot deserts are mainly found in two bands on either side of the Equator, close to the Tropic of Cancer at $23.5^{\\circ}\\text{ N}$ and the Tropic of Capricorn at $23.5^{\\circ}\\text{ S}$. This clear global pattern earns **B1**.","highlights":[{"text":"Using **Figure 1**","location":"specification"}]},{"type":"text","order":1,"title":"Notice western coasts","content":"Next, use a location pattern from the map: many hot deserts lie on the western margins of continents. For example, the

Hot deserts

Question 14

Hot deserts Questions

Hot deserts

Question 14

Hot deserts Questions