Religion question? cavemen?

if god created man on the 7th day when were dinosaurs around? and in that case how come they have cavemen bones if adam and eve were the first were they cavemen? and one more if the earth was destroyed by a huge flood and all that was left was Noah and his sons do we all come from Noah? i would like an answer i may be wrong about certain things i just want to know how all these tie in together.