Human activity increases the greenhouse effect and leads to global warming.
The diameter of our galaxy is about 100,000 light years; it contains more than 100...
This animation demonstrates different types of soil.
The flora and fauna of the savannahs adapt to the climate.
Lateral compressive forces cause rocks to form folds. This is how fold mountains are formed.
The ozone layer filters the Sun´s harmful UV radiation, therefore it is indispensable for...
The deepest lake in Earth was formed in a rift valley created by the Baikal Rift Zone.
This lesson presents deserts and their flora and fauna.
The Earth’s magnetic North and South poles are located near the geographic North and...