What Makes It A Reptile?

Classification is how the scientists group all animals together.

Reptiles classification: 

Kingdom-Animalia

Phylum-Chordata  

 Class-Reptilia

Turtles and Tortoises are in the Order Testudines. Lizards, Snakes, and Worm Lizards are in the Order Squamata. Tuataras are in the Order Rhynchocephalia. Crocodiles, Alligators, Gharials, and Caimans are in the Order Crocodilia.