Paleontologists assume most dinosaurs made sounds of some kind - in a few cases, they are almost sure of it - but the operative word is assume. In many, if not most cases, we simply don't know if the various dinosaurs made sounds or not.
There were dinosaurs. They went roar.
No, that's impossible cause Roar sung by Katy Perry is a song.
Yes most of the animals do roar
To find information on dinosaurs for children, one should visit the BBC children's learning page. Alternatively, there are several dinosaur books, such as 'Dinosaur Roar!'
Trex didn't roar, but it is thought it made loud vibration from its chest.
Except for today's bird, which are in the family of Theropod dinosaurs, no human or humanoid has ever heard a dinosaur. The dinosaurs, except for birds, were extinct far, far before the very first humans appeared on Earth. I suppose you could say that the theropod dinosaurs tweeted and chirped, but it is hard to imagine that the giant Tyrannosaurus rex (Also a Theropod) tweeted!
Most dinosaurs were herbivores. There was a wide variety or carnivorous dinosaurs, though, and all herbivorous dinosaurs evolved from the earliest carnivorous dinosaurs. Birds are descendants of carnivorous dinosaurs.
Dinosaurs are most closely related to birds to the extent that birds are cnsidered a branch of dinosaurs.
Some dinosaurs did have spines but most did not. The main body coverings of most dinosaurs were scales and feathers.
Platypuses do not roar. At most, they make a soft, puppy-like growling sound.
Dinosaurs don't roar to scare each other, nor do they do it to speak. They just roar to protect themselves. That's their characteristic. Just like us, they are also unique in different ways. Maybe Dinosaur's are also wondering, why do we bathe?
What most people call "flying dinosaurs" were actually pterosaurs, flying reptiles that were unrelated to dinosaurs. However, birds are considered by most scientists to be a clade of dinosaurs, and thus birds are "flying dinosaurs."