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Seas and oceans cover almost three-quarters of the Earth’s surface. 97.5% of the total...
The oxygen cycle describes the movement of oxygen within its three main reservoirs.
A glacier is a large body of ice that forms from snow, and is in constant, slow motion.
Water on Earth is in a continuous state of change. The water cycle includes processes...
Tectonic plates can move in relation to each other.
Rocks are a composed of minerals. These minerals can often be found in their pure forms.
Due to the effect of both exogenic and endogenic forces, rocks constantly change. This is called...
Short-lived but extremely powerful tornadoes can cause a great deal of damage.