Cretaceous Period Overview

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Questions and Answers

Which group of animals filled the skies during the Cretaceous period?

  • Sauropods and dinosaurs
  • Marine reptiles and mollusks
  • Pterosaurs and hairy-feathered birds (correct)
  • Rodents and conifers

What is believed by some scientists to have possibly caused the extinction of more than half the planet's species at the end of the Cretaceous period?

  • Volcanic eruption
  • Asteroid or comet impact (correct)
  • Supercontinent formation
  • Flowering plants spreading

What was cooling and moistening the planet's climate at the end of the Cretaceous period?

  • Shifted continents
  • Expanded coasts
  • Widened oceans
  • All of the above (correct)

What was left behind by vanished dinosaurs at the end of the Cretaceous period?

<p>A void for mammals to fill (D)</p> Signup and view all the answers

What filled the forests of ferns, cycads, and conifers at the start of the Cretaceous period?

<p>Rodents (B)</p> Signup and view all the answers

Which of the following statements accurately describes the climate changes during the Cretaceous period?

<p>The climate experienced a temperature spike in the mid-Cretaceous, followed by a gradual cooling trend. (A)</p> Signup and view all the answers

Which of the following dinosaur groups dominated the southern continents during the Cretaceous period?

<p>Sauropods (B)</p> Signup and view all the answers

Which of the following creatures faced stiffening competition from the diversifying birds during the Cretaceous period?

<p>Pterosaurs (B)</p> Signup and view all the answers

According to the passage, which of the following creatures proliferated on the expanded coasts during the Cretaceous period?

<p>Frogs, salamanders, turtles, crocodiles, and snakes (D)</p> Signup and view all the answers

Which of the following statements best describes the distribution of horned dinosaurs like Triceratops during the late Cretaceous?

<p>They were found in vast herds on the northern continents. (C)</p> Signup and view all the answers

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