Section D: Physical Landscapes - Hot Deserts Or
Bayani Gaba-gaba
This is the one section of Paper 1 where you get a choice. Section D offers hot desert landscapes as one question and river landscapes as the other, and you answer whichever one you have been taught. Both are shaped by the same idea: a moving fluid picks material up, carries it, and puts it down again when it runs out of energy. In a desert the fluid is usually air. In a river valley it is water. Everything else follows from that.
This lesson teaches both options in full, so that whichever your school has chosen you have it here, and so that the shared machinery is obvious. You will learn the wind and water processes that carve a desert, and build yardangs, zeugen, dunes, badlands, wadis, alluvial fans and salt lakes from them. You will follow a river from its steep headwaters to its estuary, explaining interlocking spurs, waterfalls, gorges, meanders, ox-bow lakes, levees and flood plains as you go. Then you will read a storm hydrograph, weigh hard engineering against soft, and follow the largest river management scheme on Earth from the floods that caused it to the arguments it is still causing.
Manufura
- Hot deserts are shaped by a number of physical processes.
- Distinctive landforms result from different physical processes in hot deserts.
- Development of hot desert environments creates opportunities and challenges.
- River landscapes The shape of river valleys changes as rivers flow downstream.
- Distinctive fluvial landforms result from different physical processes.
- Different management strategies can be used to protect river landscapes from the effects of flooding.
- Aeolian (wind) processes:
- erosion - abrasion and deflation
- transportation - surface creep, saltation and suspension
- deposition - why wind deposits sediment. Water processes:
- erosion - abrasion and hydraulic power
- transportation - traction, saltation and suspension
- deposition - why water deposits sediment.
- Characteristics and formation of landforms resulting from the effects of the wind - yardangs, zeugen and dunes.
- Characteristics and formation of landforms resulting from water-badlands, wadis, alluvial fans and salt lakes. Examples should be used from the region and integrated into the teaching of the content. Use example(s) in hot deserts to illustrate:
- development opportunities in hot desert environments: oil and mineral extraction, energy, farming, tourism
- challenges of developing hot desert environments: extreme temperatures, water supply, inaccessibility.
- The long profile and changing cross profile of a river and its valley.
- Fluvial processes:
- erosion - hydraulic action, abrasion, attrition, solution, vertical and lateral erosion
- transportation - traction, saltation, suspension and solution
- deposition - why rivers deposit sediment.
- Characteristics and formation of landforms resulting from erosion - interlocking spurs, waterfalls and gorges. Characteristics and formation of landforms resulting from erosion and deposition - meanders and ox-bow lakes. Characteristics and formation of landforms resulting from deposition - levées, flood plains and estuaries. Examples should be used from the region and integrated into the teaching of the content. How physical and human factors affect the flood risk - precipitation, geology, relief and land use.
- The use of hydrographs to show the relationship between precipitation and discharge. The costs and benefits of the following management strategies:
- hard engineering - dams and reservoirs, straightening, embankments, flood relief channels
- soft engineering - flood warnings and preparation, flood plain zoning, planting trees and river restoration. An example of a river flood management scheme in the region to show:
- why the scheme was required
- the management strategy/strategies
- the social, economic and environmental issues.
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Section D: Physical Landscapes - Hot Deserts Or. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which process removes loose fine material from a desert surface and leaves coarse stones behind? A. Abrasion B. Deflation C. Saltation D. Attrition Answer: B
- Which landform is a fan shaped deposit at the point where a desert valley opens onto a plain? A. Yardang B. Zeugen C. Alluvial fan D. Playa Answer: C
- Which type of erosion dominates in the upper course of a river? A. Lateral erosion B. Vertical erosion C. Coastal erosion D. No erosion occurs Answer: B
- What is lag time on a storm hydrograph? A. The time from the start of the rain to the peak discharge B. The time from peak rainfall to peak discharge C. The time the river stays above bankfull discharge D. The time taken for discharge to return to normal Answer: B
- Which of the following is soft engineering for flood management? A. Building an embankment B. Straightening a channel C. Flood plain zoning D. Constructing a flood relief channel Answer: C
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Section D: Physical Landscapes - Hot Deserts Or? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
