Deserts & Grasslands — Set 1

Correct Answer: D. Sahara Desert

• **Sahara Desert** = the largest hot desert on Earth, covering about 9.2 million sq km across 11 North African countries. • **9.2 million sq km** — the Sahara spans roughly 11 countries; Antarctica is larger overall but classified as a cold polar desert, so Sahara is the largest HOT desert. • 💡 Wrong-option analysis: Gobi Desert: the largest cold desert outside polar regions, located in China and Mongolia; Thar Desert: shared by India and Pakistan, the world's most densely populated desert; Arabian Desert: the largest desert in Asia covering the Arabian Peninsula.

Correct Answer: B. Argentina

• **Pampas** = fertile South American lowland temperate grasslands located primarily in Argentina, also extending into Uruguay and southern Brazil. • **'Breadbasket of South America'** — the Pampas support extensive cattle ranching and wheat farming; the region is one of the most productive agricultural areas in the world. • 💡 Wrong-option analysis: Australia: its temperate grasslands are called Downs (Murray-Darling basin); South Africa: its temperate grasslands are called Veld; Brazil: its tropical grasslands are called Campos or Cerrado.

Correct Answer: A. Africa

• **Veld** = wide-open temperate grasslands in Southern Africa, divided into Highveld and Lowveld based on elevation, primarily in South Africa. • **Highveld and Lowveld** — the Veld is categorized by altitude; the Highveld lies above 1,200 m and the Lowveld below 600 m; vital for livestock farming and wildlife. • 💡 Wrong-option analysis: South America: its temperate grasslands are called Pampas (Argentina) and Campos (Brazil); North America: its temperate grasslands are called Prairies; Asia: its temperate grasslands are called Steppes.

Correct Answer: B. Atacama Desert

• **Atacama Desert** = driest non-polar desert on Earth, located in South America between the Andes Mountains and the Chilean Coast Range. • **~1 mm/year rainfall** — some parts of the Atacama receive virtually zero rainfall; the hyper-arid conditions are caused by a constant temperature inversion; it is a major source of nitrates and copper. • 💡 Wrong-option analysis: Namib Desert: a coastal desert in southern Africa (Namibia), ancient but not the driest; Sonoran Desert: in southwestern USA and northwestern Mexico, known for the Saguaro cactus; Kalahari Desert: a semi-arid savanna in southern Africa (Botswana), not hyperarid.

Correct Answer: A. Eurasia

• **Steppes** = vast temperate grasslands stretching from Eastern Europe to Central Asia (Eurasia), characterized by semi-arid continental climate with hot summers and cold winters. • **Eurasian Steppe Belt** — the Steppes span thousands of kilometers; historically they were the domain of nomadic horse-riding civilizations like the Mongols and Scythians. • 💡 Wrong-option analysis: Central Australia: known as the 'Red Centre'; its grasslands are called Downs or Mitchell Grass Downs; North Africa: location of the Sahara Desert, not temperate grasslands; Southern Argentina: location of the Patagonian Desert and Pampas, not Steppes.

Correct Answer: D. Gobi Desert

• **Gobi Desert** = cold desert in northern China and southern Mongolia, natural habitat of the wild Bactrian camel (two humps), also known for dinosaur egg fossil discoveries. • **Bactrian camel** — wild Bactrian camels are critically endangered with fewer than 1,000 remaining; they differ from Arabian (dromedary) camels which have only one hump. • 💡 Wrong-option analysis: Sahara Desert: home to the dromedary (one-humped) camel, not the Bactrian; Arabian Desert: habitat of dromedary camels; Thar Desert: in India-Pakistan, has dromedary camels but not the wild Bactrian.

Correct Answer: D. North America

• **Prairies** = vast temperate grasslands of central North America, covering large parts of the USA and Canada, called the 'breadbasket of the world'. • **'Breadbasket of the World'** — most original prairie land is now used for commercial grain agriculture (wheat, corn, soy); they once supported massive herds of bison. • 💡 Wrong-option analysis: South America: its temperate grasslands are Pampas (Argentina); Africa: has Savanna (tropical), Veld (temperate South Africa); Australia: its temperate grasslands are called Downs.

Correct Answer: A. Gibson Desert

• **Gibson Desert** = large desert region in Western Australia, characterized by undulating red sand plains and dunefields. • **Australia — 2nd driest continent** — Australia is the second driest continent after Antarctica; it has multiple deserts including Gibson, Great Sandy, Simpson, and Great Victoria Deserts. • 💡 Wrong-option analysis: Kyzylkum Desert: in Central Asia (Uzbekistan-Kazakhstan), meaning 'Red Sand'; Mojave Desert: in California and Nevada, USA, famous for Death Valley; Patagonian Desert: in southern Argentina, South America.

Correct Answer: C. Savanna

• **Savanna** = mixed woodland-grassland ecosystem in tropical Africa with widely spaced trees, distinct wet and dry seasons, famous for large herbivore and predator populations. • **Serengeti** — the Serengeti in Tanzania is the most famous African Savanna, home to the world's largest annual wildebeest migration involving over 1.5 million animals. • 💡 Wrong-option analysis: Downs: temperate grasslands in Australia's Murray-Darling basin; Cantua: not a recognized grassland type; Puszta: temperate grasslands of Hungary in Europe.

Correct Answer: D. Botswana

• **Kalahari Desert** = large semi-arid sandy savanna in Southern Africa, primarily covering Botswana, also extending into Namibia and South Africa. • **Semi-arid, not true desert** — unlike the Sahara, the Kalahari receives enough rainfall to support shrubs, grasses, and diverse wildlife including lions and cheetahs; it is considered a fossil desert. • 💡 Wrong-option analysis: Chile: location of the Atacama Desert in its northern regions; Iran: location of the Dasht-e Kavir (Great Salt Desert); Egypt: located within the Sahara Desert in North Africa.