The water flowing on Earth’s surface usually moves toward sea. If an obstacle or hollow prevents water from following its course,it may form a basin. As water continues to collect,a lake created. Most lakes are freshwater contain only small amounts mineral salts. There are,however,some saltwater lakes. Some contain large amounts salt because nearby ocean water has managed to seep into them. Other lakes,such as those found in middle deserts,are extremely salty. This because their waters are constantly evaporating under Sun,leaving behind a high concentration minerals in remaining water.

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Keywords: color, earth, geology, illustration, lake, landscape, structure, water