The ancient Egyptians worshiped their gods by having priest in a large temples worship them or people in small homes. They did it because they thought it protected them. Worshipping was a huge part of Egyptian life.
The ancient Egyptians worshipped their gods because they thought the gods would protect them from floods and other things. They thought if they worshipped them the would be safe and happy.
Ra was known for creation of everything. Ra was so popular, he was worshipped a lot. He was considered the king of gods. People worshipped him because he was the creator of everything.
The symbol of the sun disk on the falcon headed man represents Ra's sun disk. The sun disk weighs heavily on Egyptian art. The sun was a primary source of light and was very popular to the ancient Egyptians.
Yes their are stories behind the god. The stories say on what his life was like and how he created the sun. They are often about his afterlife and how he is born again through the daylight.