Tag: biosphere and landscape

• Rivers carry a large amount of sediments with them. When rivers deposit these deposits near their mouths, before falling into to sea, a landform is formed that is known as delta. It has rich soil and the river in delta gets bifurcated into a number of streams making deltas highly fertile.
• Formation of the delta is influenced by the amount and rate of sedimentation, shape and slope of the coast and also by the waves striking at the coast. Hence all options are correct.

The valley is formed by the rift or faulting. It is a liner shaped low land between several highlands or mountain ranges created by the action of geologic rift or fault. 

4500 meters

With an average elevation exceeding 4,500 meters (14,800 ft), the Tibetan Plateau is sometimes called "the Roof of the World" and is the world's highest and largest plateau, with an area of 2,500,000 square kilometers  (about five times the size of Metropolitan France).

• At one point of time, all the landmass on Earth was united as one mega continent called Pangea and whole water bodies were also unified called Panthalassa.
  
• After that, the Pangea got bifurcated into the northern part as Laurasia and southern part as the Gondwanaland.
• Peninsular India was part of Gondwanaland which moved northwards to unite with rest of India. Thus the right answer is B.

Moraines are ridge-like depositional features of glacial tills. They are long but narrow ridge with height more 30 meters. Moraines are consist of rock materials of heterogeneous shapes and size.

Sea beaches are not the erosional feature of sea waves. They are formed due to the depositional activities of sea waves.

Latitude is a measure of the distance you are located from the equator.  It is commonly shown as an imaginary horizontal line that goes across the earth on maps and is used along with longitude as a reference point to determine location. The tilt of the earth affects the seasons we experience throughout the year.

The earth moves around the sun in an elliptical fashion, and one complete orbit around the sun take one year. An interesting fact is that it is not the proximity of the earth to the sun that determines the season; we are actually closest to the sun in January, not July.  Instead, the tilt of the earth is the key. When the Northern Hemisphere is tilted towards the sun, the Southern Hemisphere is tilted away from the sun. This leads to summer in the Northern Hemisphere and winter in the Southern Hemisphere as the Northern Hemisphere experiences the most direct sunlight and solar heating.