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The diameter of our galaxy is about 100,000 light years; it contains more than 100 billion...
Seawater, as an external force, plays an important role in shaping coastlines.
This video presents the different stages of coal formation.
Did you know that about 75% of the land on our planet is covered with sedimentary rock?
Waves play an important role in forming the coast.
In mountainous areas the climate, soil properties, the flora and fauna change depending on...
Water on Earth is in a continuous state of change. The water cycle includes processes such as...
Groundwater and aquifers are types of underground waters.