Free World Geography MCQs with Answers

• A. Wadi
• B. Erg
• C. Reg
• D. Playa

Explanation: A reg is a gravel-covered desert pavement, distinct from sandy ergs and rocky hamadas.

• A. A usually dry valley or stream channel that may carry water after rainfall
• B. A tall star-shaped sand dune
• C. A ridge carved by wind erosion
• D. A coastal desert cooled by ocean fog

Explanation: Wadis stay dry most of the year but can become torrents during rare desert downpours.

• A. Star-shaped ridges formed by shifting winds
• B. Its crescent shape with horns generally pointing downwind
• C. Being frozen solid year-round
• D. Forming only on rocky plateaus

Explanation: Barchans are crescent dunes whose two tips trail behind the direction the wind blows.

• A. A shallow well dug in dry riverbeds
• B. A dune that moves against the wind
• C. An elongated ridge carved by wind erosion
• D. A type of desert oasis plant

Explanation: Yardangs are streamlined rock ridges sculpted by wind-blown sand.

• A. A rocky desert plateau
• B. A desert palm grove
• C. A cold ocean current near a desert coast
• D. A dry lake bed in an enclosed basin that may temporarily hold water

Explanation: Playas are flat, sun-baked lake beds that fill with shallow water after rare rains.

• A. On the sheltered side of mountains that block much of the incoming moisture
• B. At the centre of large continents far from the sea
• C. Where cold polar winds meet warm tropical air
• D. Where two ocean currents collide offshore

Explanation: Mountains force moist air to rise and shed rain on the windward side, leaving the far side dry.

• A. The growth of new oases in arid zones
• B. Land degradation in dryland regions caused by climatic variations and human activities
• C. Sand dunes advancing into farmland
• D. The natural cooling of desert nights

Explanation: Desertification is the deterioration of dryland soils and vegetation from climate shifts and human pressure.

• A. Birds that migrate away from deserts
• B. Plants adapted to survive with limited water
• C. Animals that sleep through summer heat
• D. Fish that live in desert salt lakes

Explanation: Xerophytes have adaptations like deep roots and waxy leaves to cope with scarce water.

• A. They hunt better in darkness
• B. Their predators sleep during the day
• C. It helps them avoid daytime heat and reduce water loss
• D. Desert plants release water only at night

Explanation: Nocturnal activity lets desert animals escape extreme daytime temperatures and conserve moisture.

• A. Desert sand reflects moonlight away
• B. Oases absorb heat from the surroundings
• C. Winds blow in from the poles every night
• D. Dry air and limited cloud cover allow rapid heat loss from the ground

Explanation: With little moisture or cloud to trap warmth, heat absorbed by day radiates away fast at night.

• A. Approximately 20 to 30 degrees north and south
• B. The polar circles, near 66.5 degrees north and south
• C. The equator, 0 to 10 degrees north and south
• D. 40 to 50 degrees north and south

Explanation: The subtropical high-pressure belts around 20–30 degrees latitude create the Sahara, Arabian, Kalahari and other deserts.

• A. Rising moist air that produces heavy clouds
• B. Descending air that warms and suppresses cloud formation and rainfall
• C. Collision of warm and cold fronts
• D. Rapid evaporation from nearby seas

Explanation: Sinking air in subtropical high-pressure zones warms as it descends, inhibiting clouds and rain.

• A. Arabian Desert
• B. Gobi Desert
• C. Antarctic Desert
• D. Sahara Desert

Explanation: Antarctica, a polar desert, covers the largest desert area of any desert on the planet.

• A. Thar Desert
• B. Kalahari Desert
• C. Sonoran Desert
• D. Sahara Desert

Explanation: The Sahara is the biggest hot desert, far exceeding other hot deserts in size.

• A. Africa
• B. Asia
• C. Australia
• D. North America

Explanation: The Sahara spans the northern part of the African continent.

• A. Southern Africa
• B. North Africa
• C. Central Africa
• D. East Africa

Explanation: The Sahara stretches across North Africa from the Atlantic to the Red Sea.

• A. The Arctic Ocean
• B. The Indian Ocean
• C. The Pacific Ocean
• D. The Atlantic Ocean

Explanation: The Sahara's western edge reaches the Atlantic coast of Africa.

• A. The Mediterranean Sea
• B. The Arabian Sea
• C. The Caspian Sea
• D. The Red Sea

Explanation: North African countries between the Sahara and the Mediterranean form the desert's northern edge.

• A. Serengeti
• B. Sahel
• C. Maghreb
• D. Savanna

Explanation: The Sahel is the transitional semiarid zone stretching across Africa just below the Sahara.

• A. The Zambezi River
• B. The Niger River
• C. The Nile River
• D. The Congo River

Explanation: The Nile flows northward through the eastern Sahara toward the Mediterranean.