Phanerozoic Eon

Which of the following eras is part of the Phanerozoic Eon?

• Paleozoic Era

• Precambrian Era

• Hadean Era

• Archean Era

What type of marine life dominated the oceans during the early Paleozoic Era?

• Sharks and bony fish

• Trilobites, echinoderms, and marine invertebrates

• Mammals

• Amphibians

Which of the following describes the Mesozoic Era?

• Known as the Age of Mammals.

• Characterized by a cooler climate and ice ages.

• The supercontinent Pangea began to break apart.

• Dominated by small, thriving mammals.

What significant changes occurred during the Cenozoic Era?

• Dinosaurs thrived and peaked in population.

• The Earth's climate became warmer than today.

• Mammals, birds, flowering plants, and insects thrived and diversified.

• The supercontinent Pangea formed.