What caused the K-T mass extinction event that killed the Non-Avian Dinosaurs?

How many geological periods make up the Mesozoic Era?

The name, Tyrannosaurus rex, translates to  "Tyrant Lizard King"

Birds are taxonomically classified as Dinosaurs.

Dilophosaurus spitting venom was made up by Jurassic Park 

Velociraptor lived about 80 million years ago in what is now Mongolia. It went extinct millions of years before T. rex even existed.

Tyrannosaurus rex was an animal, it was not an invincible monster that kills everything in sight.

Spinosaurus was about 6 to 7 tons, while T. rex was about 8 to 9 tons. 

A quiz to test people on their dinosaur knowledge.