Earth's History Quiz

What event formed the moon?

• Collision with Theia

• Formation of oceans

• Pangea formation

• Great Oxidation Event

During which eon was Earth mostly covered in water?

• Phanerozoic

• Proterozoic

• Archean

• Hadean

What caused the Great Oxidation Event?

• Formation of the moon

• Volcanic eruptions

• Photosynthesis by cyanobacteria

• Asteroid impact

When did the first multicellular organisms appear?

• Hadean

• Archean

• Proterozoic

• Cambrian

What event led to the largest mass extinction in history?

• Great Oxidation Event

• Volcanic eruptions

• Formation of Pangea

• Triassic period

During which period did dinosaurs become widespread?

• Paleogene

• Triassic

• Permian

• Carboniferous

What caused the extinction of dinosaurs?

• Formation of Pangea

• Great Oxidation Event

• Asteroid impact

• Triassic period

When did mammals take over after the extinction of dinosaurs?

• Carboniferous

• Permian

• Triassic

• Paleogene

What era is known as the 'Age of Fishes'?

• Proterozoic

• Paleogene

• Devonian

• Cambrian

During which period did the first land plants appear?

• Permian

• Devonian

• Paleogene

• Triassic