World Geographical Records

Wheat is Australia's most important grain crop and a major agricultural export. The country has extensive wheat-growing regions, particularly in the wheat belt of Western Australia and the Murray-Darling basin. Rice and maize are not major crops, and potatoes, while grown, are not the chief crop.

Greenland is the largest island in the world with an area of about 2,166,000 sq km. It is technically part of North America but politically autonomous under Denmark. New Guinea and Borneo are second and third respectively.

The Panama Canal is an artificial waterway that cuts across the Isthmus of Panama, eliminating the need to sail around the southern tip of South America. It directly connects the Pacific Ocean (to its west) with the Atlantic Ocean (to its east via the Caribbean Sea).

Lake Superior is the largest freshwater lake by surface area (82,100 sq km) in the world. Lake Baikal is the deepest lake and holds the most water by volume, but is smaller in surface area. Lake Nyasa (Malawi) and Lake Victoria are in Africa and are much smaller.

The Mississippi River flows southward and empties into the Gulf of Mexico. It does not reach the Atlantic or Pacific Oceans, nor does it flow into Lake Superior (which is actually one of the sources of the St. Lawrence River system).

The Amazon River is by far the largest river in South America and the world by discharge volume of water. It originates in the Peruvian Andes and flows across Brazil to the Atlantic Ocean. The Orinoco and Paraná-Paraguay rivers are also major South American rivers, but none compare to the Amazon's massive size, length, and water volume.

The Uruguay River flows southward through Brazil, Argentina, and Uruguay before emptying into the Atlantic Ocean (Río de la Plata). It is a major river in South America and forms part of the border between Argentina and Uruguay. The river does not flow into the Pacific Ocean, Caribbean Sea, or Lake Titicaca, which is located between Peru and Bolivia.

Buenos Aires is the largest and most important port in Argentina, handling both cargo and passenger traffic. It serves as the country's primary maritime gateway for international trade.

Vostok Station in Antarctica recorded the world's coldest temperature at -89.2°C (-128.6°F) on July 21, 1983. This Russian research station sits on the Antarctic ice sheet at an elevation of 3,488 meters. Verkhoyansk in Russia also experiences extreme cold, Ust' Shchugor is in Russia, and Snag is in Canada, but none have matched Vostok's record.

 A polar ice cap or polar cap is a high-latitude region of a planet, dwarf planet, or natural satellite that is covered in ice.Around 70% of the fresh water on Earth is contained in this ice sheet.

Lake Superior is the largest freshwater lake in the world by surface area, spanning approximately 82,100 square kilometers. It is located on the border between the United States and Canada and forms part of the Great Lakes system. Badkal Lake is a smaller lake in Odisha, India, while Wullar Lake is in Jammu and Kashmir and is one of India's largest freshwater lakes.

The Southern Hemisphere is called the water hemisphere because it has a much larger proportion of water surface compared to land. About 80% of the Southern Hemisphere is covered by oceans, while the Northern Hemisphere has more landmass with continents like Asia, Europe, and North America.

The atmosphere (air) is the largest nitrogen reservoir, containing approximately 78% nitrogen gas (N2) by volume. This represents about 4×10^21 tons of nitrogen. While soil contains nitrogen in organic and inorganic forms, and the sea contains dissolved nitrogen, neither compares to the massive atmospheric reservoir. Rocks contain minimal nitrogen.

Correct Answer: Mississippi River System

Marine ecosystems cover about 71% of Earth's surface, making them the largest ecosystem by area. This includes all oceans and seas, which far exceed the total area of all terrestrial ecosystems combined - deserts cover about 33%, mountains about 25%, and other land ecosystems the remainder.