no.
same color shell
Yes; all 7 Species.
Yes, they are the same, Leatherbacks only live in the sea
No, most turtles have broader color vision than humans, including limited UV range.
there is no such thing as a normal sea turtle only different types
Yes, according to seaturtle.org, all sea turtles are oviparous
all sharks eat sea turtles
Yes. All sea turtles are listed as threatened or extinct.
They travel to the sea the minute they hatch from their eggs. All the baby turtles hatch at about the same time and the whole group will race to the water before predators come.
Yes. All turtles, sea turtles, and tortoises are reptiles.
If you mean Loggerhead Sea Turtles, then they lay eggs. (I think all turtles lay eggs) Loggerheads, as well as all other Sea Turtles, lay their eggs on a beach, usually the same beach where they themselves hatched.
Yes, Green sea turtles have skin, all sea turtles have thick, leathery skin