What is the split between the eastern orthodox church and the catholic church called?

I'm doing this assignment for Global Studies and I can't find that answer. I just need a simple answer, thank you!

The Great Schism. 1054 A.D.

The funny looking hats...and long beards...

It is called the Great Schism, and is often dated for convenience as 1054, the date that Cardinal Humbert excommunicated the Orthodox Patriarch! But the estrangement was a slow process that built for many years. It wasn't until much later that any canon (rule) was set by any Orthodox church concerning the reception of converts from the church of Rome.

it is called the great schism or east-west schism or excommunication of the ex communicator.

It is called a "Schism".

The Catholic Church calls it "The Great Rebellion."