Multiple choice

During which of the following periods were dinosaurs abundant?

  1. Archeozoic

  2. Coenozoic

  3. Mesozoic

  4. Palaeozoic

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 The dinosaurs and the mammals appeared during the Triassic period, roughly 225 million years ago. The dinosaurs went extinct 65 million years ago. The Mesozoic Era lasted about 180 million years, and is divided into three periods, the Triassic, the Jurassic and the Cretaceous.