Question

what is the difference between theropods and saurapods?

Answer 1

Theropods may be defined as birds and all saurischians more closely related to birds than to sauropods. ... Whereas these animals closely resemble dinosaurs and have many carnivorous features, they also lack a number of features present in dinosaurs, saurischians, and theropods.

Answer 2

Theropods literally means beast footed.
They were the kind of dinosaurs whose foots were large and terribly designed, they were mainly non vegetarian dinosaur. EG:Tyrannosaurus rex, velociraptor etc.
Sauropoda were the types of dinosaurs whoes neck were very long and legs were elephant like EG:diplodocus, titanosaur.
Biggest Theropods was Rajasaur
Biggest sauropods was mamenchisaurs