HOW MANY CONTINENTS EXIST? / ¿CUANTOS CONTINENTES EXISTEN?

EXIST DIFFERENT CLASIFICATIONS, SOME SCIENTIST SAYS "THEY ARE FOUR: AMERICA, EURASIA-AFRICA, ANTARCTICA AND AUSTRALIA", OTHER SAYS "FIVE: AMERICA, EUROPE, ASIA, AFRICA, AND AUSTRALIA", OTHER SAYS" THEY ARE SIX: NORTH AMERICA,SOUTH AMERICA, EURASIA, AFRICA, ANTARTICA AND AUSTRALIA", BUT THE MOST SCIENTISTS SAY " EXIST SEVEN CONTINENTS, THEY ARE: NORTH AMERICA, SOUTH AMERICA, EUROPE, ASIA, AFRICA, AUSTRALIA AND ANTARCTICA"