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This video presents the different stages of coal formation.
The animation presents the largest mountains, plains, rivers, lakes and deserts of the...
The Earth’s magnetic North and South poles are located near the geographic North and...
Climate is the typical weather of a certain region that changes practically only on a...
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.
Short-lived but extremely powerful tornadoes can cause a great deal of damage
Groundwater and aquifers are types of underground waters.