How to tell if your plant is indica or sativa

I'm a newb, I know...but I'm just curious if my plant is indica or sativa. I think it might be sativa but i'm not sure. I'm not even sure if you can tell this young but it's worth a shot

Here's a pic

Oh what the hell, I'm gonna say Indica or Strong Indica cross, look a little thinner that my NL seedling, but not near thin enough for sativa.

ehhh.... I think it's a cross between indica and sativa too with more indica characteristics for sure.
hope that helped if you buy jorge's medical bible you should be able to get whatever you need to know in there about the basics. tricks and tips would be on here that isn't on there.

absolutely indica
indicas are darker green/purple, whereas sativa are more lighter and sometimes yellower, but you cant tell that yet
indicas grow short and squat with close-in branches, and sativas are tall and branch out a lot, but you cant tell that yet
but indicas have wider lips on their leaf edges, and sativas have long and skinny lips

all of this combined combined makes sativas the hipster of the cannabis world

Alright awesome. Thanks for the replies!