The main difference between basketball and soccer is the method used for taking the ball to the opponents' goal. In basketball, players take the ball and bounce it on the ground to advance it down the court. In soccer, players use their feet to kick the ball down the field without any use of their hands.
Though this is the main difference, many other differences exist as well. Scoring, for example, is unique to each of the two sports. Goals in soccer always count as one point each, whereas a completed basketball shot could be worth one, two or three points depending on distance and circumstances. Likewise, the goals for the two sports are different. Soccer goals are large box-shaped features 8 feet high and 24 feet wide instead of the circular basketball goals, which are placed 10 feet in the air but are only as large enough to allow the basketball to pass through. The fields are also different, as soccer is typically played outdoors on grass and basketball is typically played on a paved or wooden court. There are many other differences as well, including penalties, the time of play and the number of players on the field at one time.