Lightning is a sudden electrostatic discharge accompanied by a sound known as thunder.
We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.
The circumference of the Earth has already been calculated in ancient Egypt. The calculations...
The animation presents the largest mountains, plains, rivers, lakes and deserts of the Earth.
One third of the continents is covered with desert. Today, desertification is a growing problem.
The boundaries of tectonic plates can be seen on the seafloor.
The decisive factor that determines the climate zones of mountains is the altitude above sea level.
A tartósan fagyott altalaj határa – a globális felmelegedés hatására – egyre jobban húzodik vissza.
Az afrikai kontinens földtani formálódása és földrajzi felosztása.