Which is the most popular dinosaur?

Tyrannosaurus rex by a wide margin. It's been the most popular dinosaur in surveys since the 1930s. The combination of size (40 feet long, 12 feet tall at the hip), age (one of the last species before the K-Pg extinction), and good preservation in North American fossil beds keeps it dominant in public imagination.

Did Velociraptors really look like Jurassic Park?

Not really. Real Velociraptors were roughly turkey-sized, about 3 feet tall, with feathered bodies and a long stiff tail. The large reptilian "raptors" in Jurassic Park are based on Deinonychus or Utahraptor, with the Velociraptor name applied for branding reasons. The book's author has acknowledged this.

Were dinosaurs warm or cold blooded?

The current scientific consensus, based on bone histology and metabolic studies, is that most dinosaurs were warm-blooded or somewhere in between. Birds, descendants of theropod dinosaurs, are fully warm-blooded, and bone-growth analysis of large theropods suggests their ancestors were too.

What killed the dinosaurs?

An asteroid roughly 6-9 miles across struck what is now the Yucatán Peninsula 66 million years ago, leaving the Chicxulub crater. The impact and its aftermath, global wildfires, debris-blocked sunlight, climate disruption, drove the K-Pg mass extinction. Non-avian dinosaurs were among the casualties; birds (technically dinosaurs) survived.

How accurate are dinosaur reconstructions in films?

Increasingly accurate. Modern paleontology shows most theropods (T-Rex, Velociraptor, etc.) had at least some feathers. Tail postures are now understood to be roughly horizontal, not dragged. Skin colour is mostly speculation but recent specimens with preserved melanosomes have revealed patterning in a few species.

T-Rex to Triceratops: a beginner's guide to popular dinosaurs