Sedimentary rock

Did you know that about 75% of the land on our planet is covered with sedimentary rock?

Related extras

The water cycle (basic)

Water on Earth is in a continuous state of change. The water cycle includes processes...

Folding (advanced)

Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.

The Gregorian calendar

Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most...

Atmospheric circulation

The difference between the temperature of the polar and equatorial zones causes...

Coal formation

This video presents the different stages of coal formation.


An earthquake is one of the most devastating natural phenomena.

Layers of the ocean

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

The weather forecast

The weather can be forecast with different meteorological instruments.

Added to your cart.