10 most difficult deserts riddlesDeserts quiz
How much of Australia coastline is desert? (Out of the total 21,262 miles/34,218 km)
140 miles (225 km)
1,000 miles (1,600 km)
3,000 miles (4,800 km)
14,000 miles (22,500 km)
More than 40% of Australia's land is classified as desert, but almost all of it is located inland. The Great Sandy Desert is the only one to extend to the coast, forming the long sweep of the Eighty Miles Beach (which is actually 140 miles long).
Which desert has this famous "eye"?
The Richat Structure in Mauritania, also known as the Eye of the Sahara, was interpreted as an asteroid impact structure, but no evidence of shock metamorphism has been found. Today, scientists believe that it is a huge (40 km in diameter) and deeply eroded geologic dome.
What is the world's second largest non-polar desert?
Great Victoria Desert
The Arabian Desert is twice as large as the Gobi, and four times larger than Great Victoria and Kalahari. It occupies most of the Arabian Peninsula.
The Australian Gibson Desert is named after Alfred Gibson. Who was he?
a man who got lost in the desert
the first president of Australia
the explorer that first crossed Australia
a famous Australian poet
The Gibson Desert was named by explorer Ernest Giles after a member of his party, who became lost and presumably died in the desert. There is almost nothing known about Alfred Gibson apart from his disappearance.
Why is White Sands Desert in New Mexico so purely white?
it is gypsum
it is very fine grained sand
it iswhite quartz
it is an optical illusion
White Sands, having 442 total square kilometers of dune fields, is the world's largest surface deposit of gypsum. Unlike other desert sands, it is cool to the touch, due to the high rate of evaporation of surface moisture and the fact that the sands reflect, rather than absorb, the sun's rays.
What is a Fata Morgana?
a chemical reaction
an optical phenomenon
an optical illusion
The Fata Morgana occurs because rays of light are bent when they pass through air layers of different temperatures in a steep thermal inversion, where an atmospheric duct has formed. It significantly distorts the object on which it is based, often such that the object is completely unrecognizable. The Fata Morgana may be seen on land or at sea, in polar regions, or in deserts. It may involve almost any kind of distant objects, including boats, islands, and the coastline.
Visiting Antarctica, we will not be able to see:
the saltiest lake in the world
the most oxygenated lake in the world
a stony desert
In Antarctica we can find the Erebus high volcano at nearly 4 km, the Don Juan pond with a salinity of 44.2%, and the desert of the McMurdo Valleys. Lake Vostok with an oxygen content 5 times more than the average, however, is hidden under a 4 km layer of glacier.
What is the name of this distinctive sandy desert north of Tibet?
The Taklamakan is the world's second largest shifting sand desert with about 85% made up of shifting sand dunes. Because it lies in the rain shadow of the Himalayas, the Taklamakan is a paradigmatic cold desert climate. During the 2008 Chinese winter storms episode, the Taklamakan was reported to be covered for the first time in its entirety with a thin layer of snow reaching 4 centimeters (1.6 in).
What is that?
A yardang is a streamlined protuberance carved from bedrock or any consolidated or semiconsolidated material by the dual action of wind abrasion by dust and sand, and deflation which is the removal of loose material by wind turbulence. They can be found in most deserts across the globe.
Welwitschia is known as the plant with the longest living leaves. How many leaves does it produce in its centuries-spanning lifetime?
More than 100
More than 1000
Welwitschia is endemic to the Namib desert. The age of individual plants is difficult to assess, but many plants may be over 1000 (or even 2000) years old. Because Welwitschia only produces a single pair of foliage leaves, the plant was thought by some to be neotenic, consisting essentially of a "giant seedling." However, research showed that its anatomy is not consistent with the giant seedling idea. Instead, the plant is more accurately thought of as achieving its unusual morphology as a result of having "lost its head" (apical meristem) at an early stage.