Q:

How do deserts form?

A:

Deserts form in general from the high atmospheric pressure and cold air that comes from the upper altitudes nearby. The heat from the sun causes high ground temperatures with low humidity.

The fact that glaciers have been retreating during the past 8,000 to 10,000 years is a major contributing factor to the formation of deserts. The land that previously had been covered with a great deal of water for thousands of years has since dried out. Leaving the area arid and dry. Deserts are formed in several ways. One type is formed by a "rain shadow," which occurs to land is between two mountain ranges. The precipitation falls on the other side of the mountains, leaving the land in-between dry. Deserts have been around for approximately 125 million years, according to evidence that has been found.

Sources:

  1. nmsu.edu

Is this answer helpful?

Similar Questions

  • Q:

    How do fossils form?

    A:

    Fossils form when a dead animal or plant is covered by sediment. Eventually, the organic matter in the bone or plant, such as the blood vessels and tissue, slowly turns into rock, which becomes known as a fossil.

    Full Answer >
    Filed Under:
  • Q:

    How does a rainbow form?

    A:

    Rainbows form when water in the air reflects and refracts sunlight and disperses the normally white sunlight into colored light. White light is composed of colored light that bends at different angles when reflected and refracted, separating the white light into the distinct colors of a rainbow.

    Full Answer >
    Filed Under:
  • Q:

    How does a thunderstorm form?

    A:

    Thunderstorms form when rapidly rising warm air brings moisture to higher parts of the atmosphere, then water vapor cools and condenses into droplets that fall to the Earth as rain. The process of rising warm air is called convection, which occurs when the atmosphere above the surface of the planet is unstable due to sudden changes in air pressure and temperature.

    Full Answer >
    Filed Under:
  • Q:

    How did Mt. Etna form?

    A:

    A controversial theory proposed in 2010 and put forth in Science Daily explains that Mt. Etna came from intraplate volcanism and induced decompression melting of the upper mantle when movement of the African plate caused magma to flow towards the island of Sicily. Most volcanoes form near plate boundaries when the Earth is tectonically active. Mt. Etna and its nearby volcanoes formed far away from associated active boundaries.

    Full Answer >
    Filed Under:

Explore