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The rise and drop of sea levels caused by the gravitational force of the Moon.
Water on Earth is in a continuous state of change. The water cycle includes processes...
Seas and oceans cover almost three-quarters of the Earth’s surface. 97.5% of the total...
The Earth is divided into geographical and climatic zones, which result in the zonation...
Plate tectonics is a theory dealing with the movement of plates.
Natural gas and petroleum are among the most important sources of energy and raw materials today.
This animation demonstrates different types of volcanic eruptions
The last Ice Age ended about 13 thousand years ago.