Tag: geography

The equatorial radius of the Earth is approximately 6,378 km.

For organisms to live, certain environmental conditions (such as proper temperature and moisture) must exist, and the organisms must be supplied with energy and nutrients (food). All the animal and mineral nutrients necessary for life are contained within Earth's biosphere.

Eratosthenes, a Greek mathematician and astronomer, is famous for calculating the circumference and radius of the Earth with remarkable accuracy using the shadows of the sun.

In the troposphere, temperatures decrease by an average of 6.5 degrees Celsius per one thousand meters, which works out to about 3.5 degrees Fahrenheit per thousand feet.

SI Units: Temperature is Degree celsius

One degree Celsius is an interval of 1 K, and zero degrees Celsius is 273.15 K. An interval of one Celsius degree corresponds to an interval of 1.8 Fahrenheit degrees on the Fahrenheit temperature scale.

Young rivers, characterized by high velocity and steep gradients, primarily perform vertical erosion, which results in the formation of V-shaped valleys.

The soil in the delta regions are Alluvial soil.

Largest delta in India is Sunderban delta.

In the upper course of a river gradients are steep and river channels are narrow. Vertical erosion is greatest in the upper course of a river. As the result of this typical features include steep valley sides, interlocking spurs, rapids, gorges and waterfalls.

The Ganges-Brahmaputra delta (the Sundarbans delta) is the largest delta in the world.