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The standard reference period used to calculate climate averages is 30 years or more."},{"text":"10 years or more","correct":false,"explanation":"A ten-year period may contain unusual variations and is shorter than the standard climate reference period. Climate is usually measured using averages from 30 years or more."},{"text":"12 months or more","correct":false,"explanation":"Twelve months reveal seasonal weather patterns but not long-term climate. Climate averages are normally calculated across 30 years or more to reduce short-term variability."},{"text":"100 years or more","correct":false,"explanation":"Although century-long records can be studied, this is not the usual minimum reference period. Climate is generally defined using weather averages from 30 years or more."}]},{"id":"37a80954-3245-4546-8448-d205bb61760d","cardType":"basic","points":1,"front":"Why is incoming solar energy more intense at the Equator?","back":"It is concentrated over a smaller surface area.","mcqOptions":[{"text":"It is concentrated over a smaller surface area.","correct":true,"explanation":"Near the Equator, the Sun’s rays strike Earth more directly, so the same amount of solar energy is concentrated over a smaller surface area."},{"text":"It is concentrated over a larger surface area.","correct":false,"explanation":"Concentrating energy over a larger area would reduce its intensity. At the Equator, direct solar rays concentrate the incoming energy over a smaller surface area."},{"text":"It is spread over a smaller surface area.","correct":false,"explanation":"Spreading energy over a smaller area is contradictory because concentration, not spreading, increases intensity. Equatorial sunlight is concentrated over a smaller surface area."},{"text":"It is absorbed entirely by the atmosphere.","correct":false,"explanation":"The atmosphere absorbs some solar radiation at every latitude, but this does not explain greater equatorial intensity. Direct rays concentrate energy over a smaller surface area."}]},{"id":"8a52a336-5076-43c3-9dcb-55aed9a96fcc","cardType":"basic","points":2,"front":"What happens to warm air during convection?","back":"It expands, becomes less dense and rises.","mcqOptions":[{"text":"It expands, becomes less dense and rises.","correct":true,"explanation":"Heating causes air particles to spread farther apart, so the air expands and becomes less dense than its surroundings. This buoyant warm air then rises."},{"text":"It contracts, becomes more dense and rises.","correct":false,"explanation":"Warm air does not normally contract or become denser. Heating makes it expand and become less dense, causing it to rise through cooler surrounding air."},{"text":"It expands, becomes more dense and sinks.","correct":false,"explanation":"Expansion reduces air density rather than increasing it, and less-dense warm air rises rather than sinks. Heating therefore makes air expand, become less dense and rise."},{"text":"It contracts, becomes less dense and sinks.","correct":false,"explanation":"Although less-dense air rises, it does not contract or sink when warmed. Warm air expands, becomes less dense than nearby air and rises."}]},{"id":"6e04c093-f561-4df8-84ef-0e1e3cad6ee6","cardType":"cloze","points":null,"front":"Low pressure forms where air [ ]; high pressure forms where air [ ].","back":"Low pressure forms where air rises; high pressure forms where air sinks.","mcqOptions":[{"text":"Low pressure forms where air rises; high pressure forms where air sinks.","correct":true,"explanation":"Rising air removes air mass from the surface, producing low pressure. Sinking air adds and compresses air near the surface, producing high pressure."},{"text":"Low pressure forms where air sinks; high pressure forms where air rises.","correct":false,"explanation":"This reverses the pressure relationship. Rising air creates low surface pressure, while sinking air increases the amount and weight of air at the surface, creating high pressure."},{"text":"Low pressure forms where air rises; high pressure forms where air rises.","correct":false,"explanation":"Rising air is correctly associated with low pressure, but high pressure develops where air sinks, not where it also rises."},{"text":"Low pressure forms where air sinks; high pressure forms where air sinks.","correct":false,"explanation":"Sinking air is correctly associated with high pressure, but low pressure forms where air rises and reduces the air mass pressing on the surface."}]},{"id":"5ee061a6-fe15-45a1-ab3a-e37e05ede900","cardType":"basic","points":2,"front":"Why does rising air often produce rainfall?","back":"It cools, so water vapour condenses.","mcqOptions":[{"text":"It cools, so water vapour condenses.","correct":true,"explanation":"As air rises, lower atmospheric pressure allows it to expand and cool. Cooling to the dew point causes water vapour to condense into cloud droplets and potentially rain."},{"text":"It warms, so water vapour evaporates.","correct":false,"explanation":"Rising air normally expands and cools rather than warming. The cooling causes water vapour to condense into droplets, which can grow and fall as rain."},{"text":"It cools, so water vapour evaporates.","correct":false,"explanation":"Cooling does not promote evaporation; it brings air closer to saturation. Water vapour then condenses into cloud droplets, allowing rainfall to develop."},{"text":"It warms, so water vapour condenses.","correct":false,"explanation":"Condensation is associated with cooling to the dew point, not warming. Rising air expands and cools, causing water vapour to condense."}]},{"id":"587ac030-1320-4043-9389-c2bd07fec6c9","cardType":"basic","points":2,"front":"Why is high pressure usually linked to dry weather?","back":"Sinking air warms and becomes drier.","mcqOptions":[{"text":"Sinking air warms and becomes drier.","correct":true,"explanation":"As air sinks, increasing atmospheric pressure compresses and warms it. Its relative humidity falls, making condensation, cloud formation and rainfall less likely."},{"text":"Sinking air cools and becomes more humid.","correct":false,"explanation":"Sinking air is compressed and warms rather than cools. This warming lowers its relative humidity, so it becomes drier and discourages cloud formation."},{"text":"Sinking air warms and becomes more humid.","correct":false,"explanation":"Although sinking air warms, warming increases its capacity to hold water vapour and lowers relative humidity. It therefore becomes drier, not more humid."},{"text":"Sinking air cools and becomes drier.","correct":false,"explanation":"Dry conditions are correctly identified, but sinking air warms through compression rather than cooling. The resulting lower relative humidity suppresses clouds and rainfall."}]},{"id":"8b7e5a56-afb8-4e55-9ef2-afda653b321a","cardType":"basic","points":1,"front":"What direction does wind move between pressure areas?","back":"From high pressure to low pressure.","mcqOptions":[{"text":"From high pressure to low pressure.","correct":true,"explanation":"The pressure-gradient force pushes air away from areas of high pressure and towards areas of low pressure, producing wind between the pressure systems."},{"text":"From low pressure to high pressure.","correct":false,"explanation":"This reverses the pressure-gradient force. Air is pushed from high-pressure areas, where air is more compressed, towards lower-pressure areas."},{"text":"From the Equator to the poles.","correct":false,"explanation":"Wind direction is controlled by pressure differences, not simply latitude. Air moves from high pressure towards low pressure, although the Coriolis effect can deflect it."},{"text":"From the poles to the Equator.","correct":false,"explanation":"A pole-to-Equator direction is not universal and ignores pressure patterns. The pressure-gradient force drives wind from areas of high pressure towards areas of low pressure."}]},{"id":"f0ea9627-8b9b-45ae-a091-e996acad4790","cardType":"cloze","points":null,"front":"The Coriolis effect deflects winds to the [ ] in the Northern Hemisphere and to the [ ] in the Southern Hemisphere.","back":"The Coriolis effect deflects winds to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.","mcqOptions":[{"text":"The Coriolis effect deflects winds to the right in the Northern Hemisphere and to the left in the Southern Hemisphere.","correct":true,"explanation":"Earth’s rotation makes moving air appear to turn right in the Northern Hemisphere and left in the Southern Hemisphere, when viewed in its direction of travel."},{"text":"The Coriolis effect deflects winds to the left in the Northern Hemisphere and to the right in the Southern Hemisphere.","correct":false,"explanation":"This swaps the hemispheric directions. Earth’s rotation produces an apparent deflection to the right in the Northern Hemisphere and to the left in the Southern Hemisphere."},{"text":"The Coriolis effect deflects winds to the right in the Northern Hemisphere and to the right in the Southern Hemisphere.","correct":false,"explanation":"The Coriolis deflection changes direction across the Equator rather than remaining rightward. Winds turn right in the Northern Hemisphere and left in the Southern Hemisphere."},{"text":"The Coriolis effect deflects winds to the left in the Northern Hemisphere and to the left in the Southern Hemisphere.","correct":false,"explanation":"The Coriolis deflection is not leftward in both hemispheres. Winds are deflected right in the Northern Hemisphere and left in the Southern Hemisphere."}]},{"id":"63831a55-05fd-4afc-9b22-ed5445320e23","cardType":"basic","points":2,"front":"Why are many hot deserts found near 30° latitude?","back":"Air sinks, warms and dries, so rainfall stays low.","mcqOptions":[{"text":"Air sinks, warms and dries, so rainfall stays low.","correct":true,"explanation":"Descending air is compressed and warms, lowering its relative humidity and preventing condensation. This creates persistent dry, high-pressure conditions near 30° latitude."},{"text":"Air rises, cools and condenses, so rainfall stays low.","correct":false,"explanation":"Rising air cools and condenses, producing clouds and heavy rainfall rather than deserts. Near 30° latitude, air sinks, warms and dries, keeping rainfall low."},{"text":"Air sinks, cools and moistens, so rainfall stays low.","correct":false,"explanation":"Cooling air becomes more likely to reach saturation and form clouds, so this would not explain aridity. The air actually sinks, warms and dries near 30° latitude."},{"text":"Air rises, warms and dries, so rainfall stays low.","correct":false,"explanation":"Persistent low pressure encourages rising air, cloud formation and rainfall. Hot deserts are associated with subtropical high pressure, where air sinks, warms and dries."}]},{"id":"75403cb9-736f-4d1c-bb1e-7ae265fcdc86","cardType":"basic","points":2,"front":"How do warm ocean currents redistribute heat?","back":"They move heat from lower latitudes to higher latitudes.","mcqOptions":[{"text":"They move heat from lower latitudes to higher latitudes.","correct":true,"explanation":"Warm currents carry energy away from tropical and subtropical waters towards the poles, transferring heat from lower latitudes to higher latitudes."},{"text":"They move heat from higher latitudes to lower latitudes.","correct":false,"explanation":"This reverses the direction of heat transfer by warm currents. They transport heat polewards, from lower latitudes towards higher latitudes."},{"text":"They move heat from western longitudes to eastern longitudes.","correct":false,"explanation":"Warm currents redistribute heat mainly through north-south, or latitudinal, movement rather than simply crossing between longitudes. They carry heat from lower to higher latitudes."},{"text":"They move heat from polar regions to equatorial regions.","correct":false,"explanation":"Warm currents do not carry heat towards the equator from polar regions. Their poleward flow transfers heat from lower latitudes to higher latitudes."}]},{"id":"869a4472-61bc-4af1-bfa7-6c7414d46769","cardType":"basic","points":1,"front":"How does the North Atlantic Drift affect the UK?","back":"It keeps the UK milder than similar-latitude places.","mcqOptions":[{"text":"It keeps the UK milder than similar-latitude places.","correct":true,"explanation":"The North Atlantic Drift brings warm water from lower latitudes, warming the overlying air and giving the UK a milder climate than comparable latitudes."},{"text":"It keeps the UK colder than similar-latitude places.","correct":false,"explanation":"This confuses the warm North Atlantic Drift with a cold current. Its transported heat keeps the UK milder, not colder, than places at similar latitudes."},{"text":"It keeps the UK more extreme than similar-latitude places.","correct":false,"explanation":"The current moderates UK temperatures rather than making them more extreme. Warm Atlantic water keeps the UK milder than other places at similar latitudes."},{"text":"It keeps the UK unchanged from similar-latitude places.","correct":false,"explanation":"The North Atlantic Drift affects temperature significantly, so the UK is not climatically identical to comparable locations. It makes the UK milder at its latitude."}]},{"id":"fe6ec987-befe-4850-b5be-ed095aa86cc2","cardType":"cloze","points":null,"front":"During the Quaternary, colder phases are [ ]; warmer phases are [ ].","back":"During the Quaternary, colder phases are glacial periods; warmer phases are interglacial periods.","mcqOptions":[{"text":"During the Quaternary, colder phases are glacial periods; warmer phases are interglacial periods.","correct":true,"explanation":"Glacial periods are colder intervals when ice sheets expand, while interglacial periods are warmer intervals between glacials, such as the present Holocene."},{"text":"During the Quaternary, colder phases are interglacial periods; warmer phases are glacial periods.","correct":false,"explanation":"The two terms have been reversed. Glacial periods are the colder phases with expanding ice, whereas interglacial periods are the warmer phases between them."},{"text":"During the Quaternary, colder phases are glacial periods; warmer phases are glacial periods.","correct":false,"explanation":"Glacial correctly names the colder phases, but warmer phases cannot also be glacial. They are called interglacial periods because they occur between glacials."},{"text":"During the Quaternary, colder phases are interglacial periods; warmer phases are interglacial periods.","correct":false,"explanation":"Interglacial refers specifically to a warmer phase, not a colder one. Quaternary cold phases are glacial periods, while warm phases are interglacial periods."}]},{"id":"7d87b032-7bff-420c-9543-9ee2e4cf1442","cardType":"basic","points":2,"front":"How do Milankovitch cycles alter climate?","back":"They change Earth’s orbit and tilt, altering received solar energy.","mcqOptions":[{"text":"They change Earth’s orbit and tilt, altering received solar energy.","correct":true,"explanation":"Long-term variations in Earth’s orbital shape, axial tilt and wobble alter the amount and distribution of incoming solar energy, influencing glacial and interglacial cycles."},{"text":"They change the Sun’s size and output, altering received solar energy.","correct":false,"explanation":"Milankovitch cycles concern Earth’s orbital characteristics, not changes in the Sun itself. Variations in orbit and tilt alter the solar energy different regions receive."},{"text":"They change Earth’s plates and continents, altering received solar energy.","correct":false,"explanation":"Plate movement affects climate over geological timescales but is not a Milankovitch cycle. These cycles involve changes in Earth’s orbit and tilt that alter insolation."},{"text":"They change Earth’s currents and tides, altering received solar energy.","correct":false,"explanation":"Ocean circulation redistributes existing heat but does not define Milankovitch cycles. Those cycles change Earth’s orbit and tilt, altering the pattern of received solar energy."}]},{"id":"88d53385-5bda-490c-a68f-3c19f9f9284e","cardType":"basic","points":2,"front":"Why can major volcanic eruptions cause short-term cooling?","back":"Ash and sulphate particles reflect sunlight back into space.","mcqOptions":[{"text":"Ash and sulphate particles reflect sunlight back into space.","correct":true,"explanation":"Sulphate aerosols and ash reduce the solar energy reaching Earth’s surface by reflecting sunlight into space, temporarily lowering global temperatures after a major eruption."},{"text":"Ash and sulphate particles absorb heat leaving the surface.","correct":false,"explanation":"Absorbing outgoing heat would strengthen atmospheric warming rather than cause surface cooling. Volcanic ash and sulphate particles cool climate chiefly by reflecting incoming sunlight."},{"text":"Ash and sulphate particles trap sunlight close to the surface.","correct":false,"explanation":"Trapping sunlight in the lower atmosphere would increase warming. Major eruptions cause short-term cooling because airborne ash and sulphate aerosols reflect sunlight back into space."},{"text":"Ash and sulphate particles focus sunlight towards Earth’s surface.","correct":false,"explanation":"Increasing incoming solar radiation would warm Earth rather than cool it. Volcanic particles instead reflect some sunlight into space, reducing energy at the surface."}]},{"id":"841a32eb-af02-497b-8925-a5903d940708","cardType":"cloze","points":null,"front":"Ice cores contain trapped [ ] and chemical clues about past [ ].","back":"Ice cores contain trapped air bubbles and chemical clues about past temperature and greenhouse gases.","mcqOptions":[{"text":"Ice cores contain trapped air bubbles and chemical clues about past temperature and greenhouse gases.","correct":true,"explanation":"Air bubbles preserve samples of ancient atmospheres, while isotopes and chemical concentrations provide evidence about past temperatures and greenhouse gas levels."},{"text":"Ice cores contain trapped liquid water and chemical clues about past temperature and greenhouse gases.","correct":false,"explanation":"Liquid water does not preserve direct samples of the ancient atmosphere in the way sealed air bubbles do. Those bubbles, alongside chemical evidence, reveal past climates."},{"text":"Ice cores contain trapped air bubbles and chemical clues about past daily weather forecasts.","correct":false,"explanation":"Ice-core chemistry records past environmental conditions, not future daily forecasts. It provides proxy evidence about past temperature and greenhouse gas concentrations."},{"text":"Ice cores contain trapped rock fragments and chemical clues about past future climate predictions.","correct":false,"explanation":"Rock fragments are not the key source of preserved atmospheric samples, and ice cores cannot directly record future conditions. Air bubbles and chemistry reveal past temperature and greenhouse gases."}]},{"id":"24f29c7e-bc8e-48c8-8792-be5c1ede7ccc","cardType":"cloze","points":null,"front":"The greenhouse effect traps some outgoing [ ]; human-increased gases cause the [ ].","back":"The greenhouse effect traps some outgoing heat; human-increased gases cause the enhanced greenhouse effect.","mcqOptions":[{"text":"The greenhouse effect traps some outgoing heat; human-increased gases cause the enhanced greenhouse effect.","correct":true,"explanation":"Greenhouse gases absorb and re-radiate some outgoing heat. Human-driven increases in these gases intensify this natural process, producing the enhanced greenhouse effect."},{"text":"The greenhouse effect traps some outgoing sunlight; human-increased gases cause the enhanced greenhouse effect.","correct":false,"explanation":"The greenhouse effect mainly involves outgoing long-wave heat, not incoming sunlight. Human increases in greenhouse gases strengthen the process, causing the enhanced greenhouse effect."},{"text":"The greenhouse effect traps some outgoing heat; human-increased gases cause the natural greenhouse effect.","correct":false,"explanation":"Heat is correctly identified as the trapped radiation, but human-added greenhouse gases enhance the natural effect rather than cause it in its original form."},{"text":"The greenhouse effect traps some outgoing visible light; human-increased gases cause the reduced greenhouse effect.","correct":false,"explanation":"Greenhouse gases do not chiefly trap outgoing visible light, and their human-driven increase does not weaken the process. They trap heat and produce an enhanced greenhouse effect."}]},{"id":"324bf9df-4c7a-4e94-9056-2a7684962fbd","cardType":"basic","points":1,"front":"Which greenhouse gas is released by burning coal, oil and gas?","back":"Carbon dioxide.","mcqOptions":[{"text":"Carbon dioxide.","correct":true,"explanation":"Burning fossil fuels releases carbon dioxide because carbon in coal, oil and gas combines with oxygen during combustion. It is the main greenhouse gas from energy use."},{"text":"Methane.","correct":false,"explanation":"Methane is strongly associated with cattle, rice paddies and manure, not mainly with burning fossil fuels. The correct greenhouse gas from fossil-fuel combustion is carbon dioxide."},{"text":"Nitrous oxide.","correct":false,"explanation":"Nitrous oxide is linked particularly to fertiliser use and agriculture. Burning coal, oil and gas releases carbon dioxide, because their carbon is oxidised during combustion."},{"text":"Water vapour.","correct":false,"explanation":"Water vapour is a greenhouse gas, but burning fossil fuels does not directly produce it as the principal emission. The expected answer is carbon dioxide."}]},{"id":"d85726b1-bb89-4f6a-9ba8-b0f7e0322948","cardType":"basic","points":1,"front":"Which greenhouse gas is produced by cattle, rice paddies and manure?","back":"Methane.","mcqOptions":[{"text":"Methane.","correct":true,"explanation":"Cattle and manure release methane during anaerobic decomposition and digestion, while flooded rice paddies provide oxygen-poor conditions where methane-producing microbes thrive."},{"text":"Carbon dioxide.","correct":false,"explanation":"Carbon dioxide is mainly released by burning fossil fuels and deforestation. Cattle, rice paddies and manure are characteristic sources of methane instead."},{"text":"Nitrous oxide.","correct":false,"explanation":"Nitrous oxide is commonly released from fertilised soils and agricultural processes, but cattle, rice paddies and manure are key sources of methane."},{"text":"Ozone.","correct":false,"explanation":"Ozone is formed through atmospheric chemical reactions and is not directly produced by these farming activities. The greenhouse gas associated with them is methane."}]},{"id":"c0174040-7df7-47cd-bb74-ffdf83dc11ae","cardType":"basic","points":2,"front":"Why can climate change increase crop yields in cooler places?","back":"It lengthens the growing season.","mcqOptions":[{"text":"It lengthens the growing season.","correct":true,"explanation":"Warmer temperatures can extend the period between the last spring frost and first autumn frost, giving crops in cooler places more time to grow and mature."},{"text":"It shortens the growing season.","correct":false,"explanation":"Warmer conditions generally extend, rather than shorten, the frost-free period in cooler places. The correct explanation is that climate change lengthens the growing season."},{"text":"It increases the frost season.","correct":false,"explanation":"More frost would restrict plant growth and reduce the time available for crops. In cooler places, warmer temperatures can lengthen the growing season."},{"text":"It reduces the daylight season.","correct":false,"explanation":"Seasonal daylight is controlled mainly by Earth’s tilt and orbit, not climate warming. Higher temperatures can instead lengthen the growing season in cooler areas."}]},{"id":"b3776038-16ff-4a1a-8fad-321d4f921c77","cardType":"basic","points":1,"front":"How does warmer seawater contribute to sea-level rise?","back":"Warmer seawater expands.","mcqOptions":[{"text":"Warmer seawater expands.","correct":true,"explanation":"Heating causes seawater to occupy a slightly greater volume. This thermal expansion raises sea level even when no additional water is added to the oceans."},{"text":"Warmer seawater contracts.","correct":false,"explanation":"Most substances, including seawater, expand when heated rather than contract. Thermal expansion therefore raises sea level as oceans become warmer."},{"text":"Warmer seawater evaporates completely.","correct":false,"explanation":"Warmer oceans increase evaporation, but seawater does not evaporate completely. The direct sea-level mechanism is thermal expansion of the water."},{"text":"Warmer seawater freezes.","correct":false,"explanation":"Freezing would remove water from the ocean surface and is associated with cooling, not warming. Warmer seawater expands and contributes to sea-level rise."}]},{"id":"779a5ac2-0e7c-4a02-9aef-ba6e37acc75c","cardType":"basic","points":1,"front":"How does melting land ice contribute to sea-level rise?","back":"It adds water to the oceans.","mcqOptions":[{"text":"It adds water to the oceans.","correct":true,"explanation":"Melting land ice, such as glaciers and ice sheets, flows into the sea and increases the total volume of water in the oceans."},{"text":"It removes water from the oceans.","correct":false,"explanation":"Land-ice melt flows into the oceans, so it adds water rather than removing it. Removing water would lower sea level, opposite to the observed effect."},{"text":"It adds ice to the oceans.","correct":false,"explanation":"The important change is that melted land ice becomes liquid water flowing into the sea. Adding floating ice would not have the same effect."},{"text":"It adds salt to the oceans.","correct":false,"explanation":"Melting land ice may affect salinity locally, but salt is not the main cause of sea-level rise. The key effect is adding water to the oceans."}]},{"id":"19807b0c-a337-4d84-af14-4d91652e7a2d","cardType":"basic","points":1,"front":"When do glaciers retreat?","back":"When melting exceeds snowfall and ice build-up.","mcqOptions":[{"text":"When melting exceeds snowfall and ice build-up.","correct":true,"explanation":"A glacier retreats when it loses more ice through melting and ablation than it gains from snowfall and accumulation, causing its terminus to move backwards."},{"text":"When snowfall and ice build-up exceed melting.","correct":false,"explanation":"When accumulation exceeds melting, a glacier gains mass and is more likely to advance. Retreat occurs when melting exceeds snowfall and ice build-up."},{"text":"When melting equals snowfall and ice build-up.","correct":false,"explanation":"Equal gains and losses produce a stable glacier balance, so the glacier front does not systematically retreat. Retreat requires melting to exceed accumulation."},{"text":"When ice build-up exceeds snowfall and melting.","correct":false,"explanation":"Ice build-up exceeding losses would increase glacier mass and encourage advance. Retreat happens when melting is greater than snowfall and ice accumulation."}]},{"id":"2741bd2b-f9f8-44c1-91db-00ac2cf4a770","cardType":"cloze","points":null,"front":"The UK has a [ ] climate, meaning moderate and strongly influenced by the [ ].","back":"The UK has a temperate maritime climate, meaning moderate and strongly influenced by the sea.","mcqOptions":[{"text":"The UK has a temperate maritime climate, meaning moderate and strongly influenced by the sea.","correct":true,"explanation":"The UK is temperate because temperatures are moderate, and maritime because the surrounding sea moderates temperatures and strongly influences its weather."},{"text":"The UK has a tropical continental climate, meaning moderate and strongly influenced by the land.","correct":false,"explanation":"The UK is not tropical or continental. Its moderate conditions and strong ocean influence make temperate maritime the correct climate description."},{"text":"The UK has a polar maritime climate, meaning moderate and strongly influenced by the sea.","correct":false,"explanation":"Although the UK is influenced by the sea, it is not a polar climate. Its generally moderate temperatures identify it as temperate maritime."},{"text":"The UK has a temperate continental climate, meaning moderate and strongly influenced by the land.","correct":false,"explanation":"Continental climates are strongly influenced by land and usually have greater temperature extremes. The UK’s surrounding sea makes it temperate maritime."}]},{"id":"b57b79fc-8a2d-42cc-90ad-092dbdc3c4d9","cardType":"basic","points":3,"front":"Why is western UK generally wetter than eastern UK?","back":"

South-westerlies bring moist Atlantic air.
Western uplands force air to rise.
Rising air cools and condenses.

","mcqOptions":[{"text":"

South-westerlies bring moist Atlantic air.
Western uplands force air to rise.
Rising air cools and condenses.

","correct":true,"explanation":"Prevailing south-westerlies carry moist air from the Atlantic. Western uplands force it upwards, where it cools, condenses and produces relief rainfall."},{"text":"

South-easterlies bring dry continental air.
Eastern lowlands force air to rise.
Rising air warms and evaporates.

","correct":false,"explanation":"The prevailing winds bring moist Atlantic air from the south-west, and western uplands cause uplift. Rising air cools and condenses, producing more rain in the west."},{"text":"

North-easterlies bring cold Arctic air.
Western uplands force air to sink.
Sinking air cools and condenses.

","correct":false,"explanation":"Sinking air does not normally cool and condense; it warms and dries. Western rainfall is caused by moist south-westerlies being forced to rise over uplands."},{"text":"

Westerlies bring dry Atlantic air.
Eastern uplands force air to rise.
Rising air warms and condenses.

","correct":false,"explanation":"Atlantic air reaching the UK is moist, and western uplands create the main uplift. Rising air cools rather than warms, allowing condensation and rainfall."}]},{"id":"a51d93ca-eb7e-492a-8fd9-74509eae71f9","cardType":"basic","points":2,"front":"Why is eastern UK often drier after air crosses uplands?","back":"Descending air warms and becomes drier.","mcqOptions":[{"text":"Descending air warms and becomes drier.","correct":true,"explanation":"After losing moisture over the uplands, air descends on the eastern side and is compressed. This compression raises its temperature, lowers its relative humidity and produces drier conditions."},{"text":"Descending air cools and becomes wetter.","correct":false,"explanation":"Descending air is compressed and warms rather than cools, so its relative humidity falls. Therefore, eastern UK is often drier because descending air warms and becomes drier."},{"text":"Rising air warms and becomes drier.","correct":false,"explanation":"Air rises mainly on the western, windward slopes and cools as it expands. On the eastern, leeward side, descending air warms and becomes drier."},{"text":"Descending air cools and becomes saturated.","correct":false,"explanation":"Saturation is associated with rising, cooling air on the windward side, where clouds and rain form. Eastern UK lies leeward, where descending air warms and becomes drier."}]}]}],"examCountdown":{"examDate":"2027-05-18","paperLabel":"Paper 1"},"heading":"Global atmosphere and climate change","title":"Global atmosphere and climate change Flashcards","topbar":{"backHref":"/gcse/geography/edexcel/a/flashcards"},"topicSidebar":"$L38"}]}],"topicId":"09313097-e99f-54e9-ac14-e81f6a6f0ed4","walled":"$L39"}],"$L3a","$L3b"]