World Geography Online Quiz

In the case of an explosion above the ground, ground zero is the point on the ground directly below the nuclear detonation and is sometimes called the hypocenter. The World Trade Centre (in New York) site, formerly referred to as “Ground Zero” or “the Pile” immediately after the September 11 attacks.

The Humboldt Current, also called the Peru Current, is a cold, low-salinity ocean current that flows north along the western coast of South America.

The English Channel is considered the busiest shipping lane in the world and a critical route in the European shipping network. It connects the North Sea and the Atlantic Ocean.

The Great Barrier Reef is the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres over an area of approximately 344,400 square kilometres. The reef is located in the Coral Sea, off the coast of Queensland, Australia.

In spite of the shortage of raw material (iron and coal), Japan has become one of the leading steel producers of the world. After China, Japan is the second largest producer of pig iron and crude steel in the world.

Dikes are man-made structures that defend against natural forces like water, climate and altitude and are mostly constructed of material found on site. Over the centuries, the Netherlands (Holland) had frequently been flooding, from the rivers as well as the sea in varying degrees and severity.

According to the FAO, agriculture leads to around 80% of deforestation. Due to the overgrowing demand for food products, a huge amount of trees are felled to grow crops, and 33% of agriculture-caused deforestation is because of subsistence agriculture.

Africa was known as the “Dark Continent” because it remained unexplored for a fairly long period of time.

A lighthouse is a high tower equipped with a bright light and lenses that help guide ships to port at night and alert sailors about sandbars, reefs, and rocky coastlines. Each lighthouse features a large lamp on top of the building. At night, it lights up when everything around is dark.