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desert

Primary Information
Secondary Information

Definition

A desert is a region that receives less than 25 centimetres (10 inches) of precipitation per year. Deserts are characterized by hot, dry weather and sparse vegetation.

There are many different types of deserts, including:

  • Hot deserts: These deserts are located in hot, dry climates, such as the Sahara Desert in Africa.
  • Cold deserts: These deserts are located in cold, dry climates, such as the Gobi Desert in Asia.
  • Coastal deserts: These deserts are located along coasts, such as the Atacama Desert in South America.
  • Mountain deserts: These deserts are located at high altitudes, such as the Tibetan Plateau in Asia.

Deserts are home to a variety of plants and animals that have adapted to dry conditions. Some common desert plants include cacti, succulents, and shrubs. Some common desert animals include snakes, lizards, and rodents.

Deserts play an important role in the world's ecosystem. They help to regulate the Earth's climate and provide a home for a variety of plants and animals.

How can the word be used?

The desert is a harsh and unforgiving environment.

desert

Different forms of the word

Noun: desert.

Adjective: deserted.

Verb: desert.

Pronoun: desert.

Synonym: wilderness.

Antonym: oasis.

Etymology

The word "desert" has a long and complex etymology. It comes from the Latin word "desertum", which means "abandoned" or "uncultivated". The Latin word "desertum" is derived from the verb "deserere", which means "to abandon" or "to forsake".

Question

What is a desert?

AQA Science Exam Question and Answer

Question:

Explain the unique characteristics of desert ecosystems and how plants and animals have adapted to survive in such harsh environments. Provide specific examples to support your answer.

Answer:

  • Desert ecosystems are extreme environments characterised by low precipitation, high temperatures, and limited vegetation. To survive in these harsh conditions, plants and animals have evolved remarkable adaptations.
  • Plants in deserts often have modified leaves and stems to minimise water loss. For example, cacti store water in their fleshy stems and have spines instead of leaves to reduce transpiration. Some desert plants, like the creosote bush, have waxy coatings on their leaves, reducing water evaporation.
  • Animals in deserts also show impressive adaptations. The fennec fox, native to the Sahara Desert, has large ears that help dissipate heat, and its thick fur provides insulation during cold nights. The camel is another notable example, capable of storing water and tolerating high body temperatures.
  • Furthermore, desert animals are often nocturnal, active during cooler nights, and burrow underground to escape extreme temperatures during the day.

In conclusion, desert ecosystems pose significant challenges for survival, leading to incredible adaptations in both plants and animals, enabling them to thrive in these extreme environments.