The African savannah

The largest contiguous savannah in the world is in Africa. It covers about one-third of the continent.

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Formation of stratovolcanoes

Stratovolcanoes consist of layers of volcanic ash, debris and lava.

Rivers and landforms

Rivers play an important role in shaping the Earth's surface: they cause erosion as well...

The soil

Soil is the loose, uppermost, fertile layer of the Earth’s crust.


Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.


It is a sedimentary rock with high calcium carbonate content.

Mediterranean climate

It is characterised by dry, hot summers and mild winters.

Layers of the ocean

Physical properties, as well as the flora and fauna of the ocean change with depth.

The phosphorus cycle

The phosphorus cycle describes the movement of phosphorus through the lithosphere,...

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