How do I know if it's a baby tooth?

Well and yeah its a tossup. Some people lose their Back Molars way before they lose their Canines; Cause the Canine is the Long, Tall, Sharp Tooth. It kinda stands out. At 13, it really is hard to tell cause the guidelines are all kind of skewing differnt. What matters is, if it is lose, it is probably, Most Pobably a Baby Tooth. So...brush and floss and rinse when you cannot brush.....cause rinsing keeps the acidic tide at bay, I wish you happy and healthy teeth., Stop bye and vist.. Ask questions to your hearts content, God willing, they'll be people to help.