If you are training for futsal, you should use a futsal ball. It moves, feels, and reacts differently than a soccer ball. However, if you only have a soccer ball available, it would still be good to train with that one until you can get a futsal ball of your own.
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Any player may score a goal in futsal. However, the goalkeeper cannot score by throwing the ball into the opposing goal: the ball must be legally propelled.
Futsal is a possession game, just like all Futbol-related activities. You can't score without the ball.
It's filled with cotton. The cotton makes the ball heavier and helps to absorb impact, making the ball bounce less.
Futsal was created in 1930.
Outdoor soccerballs are size fives, futsal ball are smaller and heavier, normally size four.