Q Approximately how many years ago did dinosaurs first appear?
- A About 145 million years ago
- B About 230 million years ago
- C About 23 million years ago
B About 230 million years ago
Dinosaurs first appeared about 230 million years ago, during the Mesozoic Era, and thrived for approximately 160 million years.
Find a Dinosaur 
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Qantassaurus- Classification
- Ornithopoda
- Characteristics
- Herbivorous
- Era
- Cretaceous period
- Spinosaurus
- Classification
- Theropods
- Characteristics
- Carnivorous
- Era
- Cretaceous period
- Kryptops
- Classification
- Theropods
- Characteristics
- Carnivorous
- Era
- Cretaceous period
- Iguanodon
- Classification
- Ornithopoda
- Characteristics
- Herbivorous
- Era
- Jurassic period
- Cretaceous period
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