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The difference between the temperature of the polar and equatorial zones causes...
The largest contiguous savannah in the world is in Africa. It covers about one-third of the...
A periodic climate pattern that occurs across the tropical Pacific Ocean every five years.
Upon physical weathering the rock only falls into pieces, whereas during chemical weathering its...
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.
This animation demonstrates different types of soil.
The boundaries of tectonic plates can be seen on the seafloor.
Plate tectonics is a theory dealing with the movement of plates.