2025年1月17日 · Desert, any large, extremely dry area of land with sparse vegetation. It is one of Earth’s major types of ecosystems, supporting a community of plants and animals specially adapted to the harsh environment.

2025年1月17日 · Desert - Climate, Ecosystems, Adaptations: Deserts are varied and variable environments, and it is impossible to arrive at a concise definition that satisfies every case. However, their most fundamental characteristic is a shortage of available moisture for plants, resulting from an imbalance between precipitation and evapotranspiration.

2024年12月28日 · Sahara, (from Arabic ṣaḥrāʾ, “desert”) largest desert in the world. Filling nearly all of northern Africa , it measures approximately 3,000 miles (4,800 km) from east to west and between 800 and 1,200 miles from north to south and has a total area of some 3,320,000 square miles (8,600,000 square km); the actual area varies as the ...

When people think of a desert, they usually think of a sandy, hot, and dry place. But there are other types of deserts as well. A desert is any large region that gets very little rain each year. Very few plants or animals live in desert areas.

desert, Large, extremely dry area of land with fairly sparse vegetation. It is one of the Earth’s major types of ecosystems. Areas with a mean annual precipitation of 10 in. (250 mm) or less are generally considered deserts.

The standard many college textbooks use to define a desert is: an area receiving less than 10 inches (250 mm) of precipitation per year. But why do these areas get so little precipitation in the first place?

DESERT meaning: 1 : an area of very dry land that is usually covered with sand and is very hot often used before another noun; 2 : a place or area that does not have something interesting or important

2025年1月14日 · Desert - Flora, Fauna, Ecosystems: In most cases floristic links among desert regions are indicated by the presence of related species; it is unusual for identical species to be found in more than one region, except where they have been introduced by humans.

Desert areas differ greatly in their surface features, which range from mountains to plateaus to plains. The ground may be bare rock or be covered with sand, scattered boulders, or a “desert pavement” of coarse gravel and stones.

According to this definition, the planet’s largest desert is, in fact, the Antarctic Ice Sheet, whose interior receives fewer than 5 cm (2 inches) of precipitation per year and, at 13,960,000 square km (5,390,000 square miles), makes up 98 percent of the total area of Antarctica.