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Wind, as an external force, plays an important role in shaping deserts.
Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most...
It is a sedimentary rock made up of loosely structured, rough grains of rock.
Natural gas and petroleum are among the most important sources of energy and raw materials today.
The Earth is divided into geographical and climatic zones, which result in the zonation...
Tectonic plates can move in relation to each other.
The diameter of our galaxy is about 100,000 light years; it contains more than 100...
It is characterised by dry, hot summers and mild winters.