Originally Posted by islamicgirl
I guess the purpose of worship is to express your love for God, and to demonstrate your belief, faith and your desire to follow His teachings.
The actual practice of worship might add several layers to that. It can help build a sense of community around the mosque or church, and part of such worship usually involves religious readings, and explanation and interpretation of religious teachings. Its also sometimes linked to important stages of life, such as births, marriages and funerals, which both show how religion relates to everyday life and emphasises that such events are in accordance with the will of God.
I can't really think of any difference in the purpose of worship in Islam and Christianity - it is identical, I think. That wouldn't be true of "worship" in some other religions but that wouldn't seem relevant to your assignment.