Tag: geography

Barkan is a crescent-shaped sand dune produced by the action of wind predominately from one direction. One of the commonest types of dunes, it occurs in sandy deserts all over the world.

Earth takes about 365 1/4 days to revolve around the sun. As we take 365 days for a year, the difference of 1/4 of a day requires adjustment. This is why we add one day to February every four years.

The axis is an imaginary line passing through the centre of the Earth. Its two ends on the surface are called north and south poles.

1;The earth rotates around its vertical axis. The axis is an imaginary line passing through the centre of the earth. Its two ends on the surface are called North and South poles The Earth completes one rotation in 24 hours. 

Tilted axis and vertical axis are present respectively in Earth and Pluto.

Wind erosion has the greatest impact on areas with dry soil because it is easier for wind to pick up and transport dry, light soil. Characteristically, deserts have dry soil, or sand, that is easy to transport. Also, deserts often have fewer physical barriers, such as hills, trees, or other structures, that can slow the wind movement.

Earthquake refers to a sudden violent shaking and vibration of the earth's surface resulting from underground movement along a fault plane or from volcanic activity. Earthquakes can cause serious destruction to property, injury to people and even death. It happens when there is sudden movement or breaking of the tectonic plates.