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In which season does the height of the troposphere increase? (A) Rainy season (B) Winter season (C) Summer season (D) None of these
The vertical extent of the troposphere is directly tied to the temperature of the air. During the summer, the Earth's surface receives more intense solar radiation, leading to significant warming of the lower atmosphere. As air molecules gain energy, they move further apart, causing the air to expanRead more
The vertical extent of the troposphere is directly tied to the temperature of the air. During the summer, the Earth’s surface receives more intense solar radiation, leading to significant warming of the lower atmosphere. As air molecules gain energy, they move further apart, causing the air to expand and occupy more volume. This thermal expansion pushes the upper limit of the troposphere higher into the sky. Conversely, during winter, the air cools and becomes denser, leading to a contraction of the layer. This seasonal fluctuation is a key factor in understanding regional weather and atmospheric pressure changes.
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See lessWhat is the maximum height of the troposphere from the Earth’s surface? (A) 12 km (B) 18 km (C) 6 km (D) 8 km
The troposphere reaches its maximum altitude of about 18 km over the equatorial regions. This is due to the high levels of solar radiation received at the equator, which generates strong convective currents that lift the air. Additionally, the Earth's centrifugal force, resulting from its rotation,Read more
The troposphere reaches its maximum altitude of about 18 km over the equatorial regions. This is due to the high levels of solar radiation received at the equator, which generates strong convective currents that lift the air. Additionally, the Earth’s centrifugal force, resulting from its rotation, is strongest at the equator, contributing to the outward bulge of the atmosphere. This increased height means that weather systems and clouds can reach much greater altitudes in the tropics compared to the polar regions. Understanding this maximum height is essential for aviation and for studying global atmospheric circulation patterns.
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See lessThe ‘Potwar Plateau’ is a pro minent feature in which country?
The Potwar Plateau is a major geographical region in Pakistan's Punjab province. It is an uplifted area located between the Jhelum River to the east and the Indus River to the west. The plateau is famous for its "Salt Range," which contains some of the world's oldest and largest salt deposits. Its tRead more
The Potwar Plateau is a major geographical region in Pakistan’s Punjab province. It is an uplifted area located between the Jhelum River to the east and the Indus River to the west. The plateau is famous for its “Salt Range,” which contains some of the world’s oldest and largest salt deposits. Its topography is heavily dissected by streams, creating a “badlands” appearance in many areas. Historically and archaeologically, it is one of the most important sites in South Asia, containing evidence of early human civilization and providing essential mineral resources for the modern Pakistani economy.
See lessThe ‘Rift Valley’ of East Africa is a result of:
Rift valleys are significant geographical features representing a nascent divergent plate boundary. In East Africa, tensional forces are pulling the lithosphere apart, causing the crust to thin and fracture. This process, known as rifting, leads to the vertical displacement of rock blocks. The subsiRead more
Rift valleys are significant geographical features representing a nascent divergent plate boundary. In East Africa, tensional forces are pulling the lithosphere apart, causing the crust to thin and fracture. This process, known as rifting, leads to the vertical displacement of rock blocks. The subsided block or Graben, forms the valley floor, while the uplifted sides form steep escarpments or Horsts. This region is a hotbed of tectonic and volcanic activity and is geologically significant as it may eventually lead to the formation of a new ocean basin, similar to how the Red Sea was formed millions of years ago.
See lessWhich of the following mountain ranges is the oldest according to the geological time scale?
The Aravalli Range is a textbook example of an ancient orogenic belt. Formed during the Precambrian era, it was once a towering range as high as the modern Himalayas. Over hundreds of millions of years, the forces of denudation (weathering and erosion) have worn it down to its present-day status asRead more
The Aravalli Range is a textbook example of an ancient orogenic belt. Formed during the Precambrian era, it was once a towering range as high as the modern Himalayas. Over hundreds of millions of years, the forces of denudation (weathering and erosion) have worn it down to its present-day status as a series of low hills and ridges. In contrast, the Himalayas, Alps and Rockies were formed during the much later Alpine Orogeny. Geographically, the Aravallis are crucial for India as they act as a barrier against the expansion of the Thar Desert toward the fertile Indo-Gangetic plains.
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