What Greek goddess is considered mother earth?

The gods, Titans, and giants all came from one powerful goddess. Gaia, mother earth, is one of the oldest immortal there is! She was the mother of Kronus, the titan king. She was the one you gave him the idea of killing his father. She was truly evil, I mean she created the giants to kill the Greek Gods!!! Each giants was created to kill a certain god or goddess. As you can tell she wasn't very nice at all!!!!