The Amidah has 19 prayers today but back in the day, it had 18 prayers and the name just stuck with it and didn't change even though a 19th prayer was added.

Its other name is the Shemoneh-esrei prayer.

it is like a version of a church . they kneel on mats ,which are facing north, and pray to god.

Many Jews will sway slightly when praying. Adult male Jews wear a prayer shawl (Tallit) during morning prayers Adult male Jews wear tefillin (phylacteries) during morning prayers - but not on Shabbat and festivals. Male Jews and married women cover their heads while praying Jews pray three times daily: Early morning, afternoon and evening. The morning prayers consists of thanksgiving blessings for our basic abilities, psalms, the Shma (A liturgical prayer consisting of three Scriptural passages (Deuteronomy 6:4-9, 11:13-21, and Numbers 15:37-41 - see http://www.answers.com/shma) and the silent Amidah (19 blessings asking for all our needs - see http://www.answers.com/amidah). The afternoon prayers consists mainly of the Amidah. The evening prayers have the Shma and the Amidah.

Sometimes. It depends on the prayer. The Shema prayer is customarily said with eyes closed. Those who know the Amidah prayer by heart often say it with eyes closed.