Geography

Ariana Afghan Airlines is the national carrier of Afghanistan, making option A the correct answer.

The Thar Desert is commonly known as the Great Indian Desert, as it spans parts of India and Pakistan. This is the most widely recognized alternate name for the Thar Desert.

The rainiest place in Pakistan is Muzaffarabad or areas in Azad Kashmir, not Murree. Among the given options, none correctly identify the rainiest place, so 'None of these' is the correct answer.

Sir Creek is a tidal estuary located between Pakistan and India, specifically between the Pakistani province of Sindh and the Indian state of Gujarat. However, the correct international border dispute is between Pakistan and India, not Pakistan and Iran or Afghanistan. Therefore, the correct answer is Pakistan & India.

A canyon is a deep, narrow valley with steep sides, which is essentially a large form of a gorge. Therefore, the correct answer is 'Gorge'.

Each degree of longitude corresponds to a 4-minute difference in time because the Earth rotates 360 degrees in 24 hours, so 1 degree equals 4 minutes (24 hours × 60 minutes ÷ 360 degrees = 4 minutes per degree).

The largest latitude circle on Earth is the Equator because it is the circle that divides the Earth into the Northern and Southern Hemispheres and has the greatest circumference compared to other latitude lines.

The Gulf Stream is primarily caused by the large-scale circulation of the North Atlantic Subtropical Gyre, which is driven by prevailing winds (trade winds and westerlies) and Earth's rotation (Coriolis effect). This wind-driven gyre causes water to pile up along the western edge of the Atlantic Ocean, creating a difference in water level (sea surface height) that drives a strong, narrow, and fast current known as the Gulf Stream. This difference in water level, combined with density differences due to temperature and salinity, creates pressure gradients that sustain the Gulf Stream. Therefore, among the given options, 'Difference in water level' best explains the cause of the Gulf Stream.

A wind that reverses its direction seasonally is called a monsoon. Monsoons are characterized by a seasonal reversal in wind direction, typically bringing wet and dry seasons.

The Sukkur Barrage on the Indus River near Sukkur, Pakistan, was constructed during the British Raj from 1923 to 1932. It was completed and officially opened in 1932. Therefore, the correct answer is 1932 (option A). The date 1928 (option D) is incorrect as the barrage was not completed or operational at that time.

Frost shattering, also known as freeze-thaw weathering, occurs on valley sides above glaciers where water enters cracks, freezes, expands, and breaks the rock apart. This process is typical above the glacier surface, unlike plucking and abrasion which occur at the glacier base, and chemical weathering which is less dominant in cold environments.

The areas around the North and South poles within the Polar circles are known as the Frigid Zone because they experience extremely cold temperatures year-round.

Orographic rainfall occurs when moist air is forced to rise over mountains, cooling and condensing to form rain. This is distinct from other types such as monsoon or cyclonic rainfall.

The largest latitude circle on Earth is the Equator, which divides the Earth into the Northern and Southern Hemispheres and has the greatest circumference of all latitude lines.

The areas around the North and South poles within the Polar circles are known as the Frigid Zone because they experience extremely cold temperatures year-round.

The Gulf Stream is primarily caused by the difference in water level and density, which creates pressure gradients that drive the current. It is a western boundary current formed by the convergence of warm water from the Gulf of Mexico (via the Florida Current) and tropical water from the North Atlantic Equatorial Current. The prevailing winds and the Coriolis effect also contribute to its flow, but the key driver is the difference in water level and density along the Atlantic coast, which creates a pressure gradient that initiates and sustains the Gulf Stream.

Afternoon rains in equatorial regions are primarily caused by convectional rainfall, which occurs when the sun heats the land surface, causing warm air to rise, cool, condense, and form rain clouds in the afternoon.

Frost shattering, also known as freeze-thaw weathering, occurs on valley sides above glaciers where water enters cracks, freezes, expands, and breaks the rock apart. This process is typical above the glacier surface, unlike plucking and abrasion which happen at the glacier base, and chemical weathering which is less dominant in cold environments.

Each degree of longitude corresponds to a 4-minute difference in time because the Earth rotates 360 degrees in 24 hours, so 360 degrees/24 hours = 15 degrees per hour, and 60 minutes/15 degrees = 4 minutes per degree.

The Sukkur Barrage on the river Indus at Sukkur was constructed during the British Raj from 1923 to 1932. It was officially completed and opened in 1932. Therefore, the correct answer is 1932, which corresponds to option A.

A wind that reverses its direction seasonally is called a monsoon. This phenomenon is characteristic of regions like South Asia, where the wind direction changes between summer and winter, bringing distinct wet and dry seasons.

A canyon is a deep gorge, typically one with a river flowing through it, formed by erosion over a long period. Therefore, 'Gorge' is the correct term describing a canyon.

Orographic rainfall occurs when moist air is forced to ascend over mountains, cooling and condensing to form precipitation. This is specifically related to mountainous terrain, unlike the other types of rainfall listed.

Japan is called the 'Land of the Rising Sun' because it is located to the east of the Asian continent, making it one of the first countries to see the sunrise each day. This geographical position results in Japan experiencing the earliest sunrise compared to many other countries.

Geomorphology is the scientific study of the origin and evolution of Earth's landscapes, including current and past landforms. It explains how landscapes are formed and changed over time.