Natural gas and petroleum
Natural gas and petroleum are among the most important sources of energy and raw materials today.
Az afrikai kontinens földtani formálódása és földrajzi felosztása.
When masses of cold and warm air meet, weather fronts develop.
Standing bodies of water can form in depressions on the surface by both endogenic and...
Rivers play an important role in shaping the Earth's surface: they cause erosion as well...
The four outer planets (Jupiter, Saturn, Neptune and Uranus) do not have solid surfaces, thus...
It is a sedimentary rock with high calcium carbonate content.
Karst formations include dolines and dripstones.
A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.