Does the Catholic Church recognize the Orthodox Church?

Accordingly, how is the Orthodox Church different from the Catholic Church?

The Catholic Church and the Eastern Orthodox Church have been in a state of official schism from one another since the East–West Schism of 1054. The main theological differences with the Catholic Church are the papal primacy and the filioque clause.

Similarly, did the Orthodox Church split from the Catholic Church? Charlemagne's crowning made the Byzantine Emperor redundant, and relations between the East and the West deteriorated until a formal split occurred in 1054. The Eastern Church became the Greek Orthodox Church by severing all ties with Rome and the Roman Catholic Church — from the pope to the Holy Roman Emperor on down.

Subsequently, one may also ask, can a Catholic go to an Orthodox church?

Mostly yes. If a Catholic is unable to get to a Catholic mass (i.e. in Russia or an Eastern Orthodox nation), they can attend an Orthodox divine liturgy and it will satisfy their Sunday/holy day obligation. All Orthodox sacraments are considered valid by the Church.

Which is a valid distinction between the Catholic Church and the Eastern Orthodox Church?

a. only the catholic church uses the old and new testaments; the eastern orthodox church uses a distinct text called the deuterocanonical scripture. both use the old and new testaments; however, the eastern orthodox church uses additional scripture the catholic church does not.