Why Is Hanukkah Celebrated For 8 Days?

i cant find any info on hanukkah on the internet, and i dont know any jewish people. i have a project to do on hanukkah, please could you help?

please tell me , i am doing a report and i must answer these questions
1.How is Hanukkah celebrated
2. Why is Hanukkah celebrated for 8 days? I mean, why just 8 days and no more?

This question is as old as the holiday itself... If the pure oil which was found was enough for one day, then seemingly no miracle occurred on the first day of Hanukkah. Why then isn't Hanukkah celebrated for seven days -- starting with the 26th of Kislev, when the miracle began?

Many answers are given for this glaring question. In fact, Rabbi Yosef Karo (16th century author of the Code of Jewish Law) penned a book wherein he suggests 100 different answers for this question!

The following are a few of the answers given:1

1. Considering that it would take another eight days to procure pure oil, the jug of oil which contained enough oil for only one night was divided into eight equal amounts. They figured that they would light an eighth of the oil each of the next eight nights. Miraculously, on each of the eight nights of Chanukah the oil which should have lasted only an eighth of the night lasted for the entire night.

Source: http://www.chabad.org/holidays/chanukah/article_cdo/aid/459286/jewish/Why-is-Chanukah-eight-days-long.htm

How is Hanukkah celebrated?

At nightfall one candle is added each night, starting from the right and going to the left. Then the candles are lit from the newest one on the left and then one by one to the right.