Answer:
Los alótropos son diferentes formas estructurales del mismo elemento y pueden exhibir propiedades físicas y comportamientos químicos bastante diferentes. El cambio entre formas alotrópicas es provocado por las mismas fuerzas que afectan a otras estructuras, es decir, presión, luz y temperatura.
Through art, science, mathematics
Possibly the major geographic feature that served as a barrier to political unity in Greece were the mountains: the Greek cities were placed in valleys between the mountains.
A second feature would the the peninsulas and the islands: for example Crete is an island and this also helped in separating it from the other Greek towns.
Answer:
Amusement parks, penny arcades, dance halls, and other commercial amusements flourished. As early as 1910, when there were 10,000 movie theaters, the movies had become the nation's most popular form of commercial entertainment.
