Originally much of the valley laid beneath the waters of Lake Texcoco, a system of interconnected salt and freshwater lakes. The Aztecs built dikes to separate the fresh water used to raise crops in chinampas and to prevent recurrent floods. These dikes were destroyed during the siege of Tenochtitlan, and during colonial times the Spanish regularly drained the lake to prevent floods. Only a small section of the original lake remains, located outside the Federal District, in the municipality of Atenco, State of Mexico. COUNT 5
QSN1 What happened to the dikes the Aztecs built? ANS1 destroyed during the siege of Tenochtitlan QSN2 Where does the lake still remain? ANS2 municipality of Atenco, State of Mexico QSN3 Who first built the dikes in Lake Texcoco? ANS3 The Aztecs QSN4 What made up Lake Texcoco? ANS4 a system of interconnected salt and freshwater lakes QSN5 Where is the lake located in Atenco? ANS5 Federal District