Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
When masses of cold and warm air meet, weather fronts develop.
An earthquake is one of the most devastating natural phenomena.
Groundwater and aquifers are types of underground waters.
Among the climate zones with the greatest extremes, the taiga only formed in the Northern...
Waterfalls form where the river flows over a steep precipice in its course.
Waves play an important role in forming the coast.
The four outer planets (Jupiter, Saturn, Neptune and Uranus) do not have solid surfaces, thus...
On a geological time scale lakes are short-lived.