Quiz on Earth's History

How long ago did the Solar System begin to emerge?

• 4.5 billion years ago

• 2.4 billion years ago

• 3.8 billion years ago

• 4.5 million years ago

What was the first atmosphere on Earth primarily composed of?

• Oxygen and nitrogen

• Hydrogen sulfide, methane, and carbon dioxide

• Carbon monoxide and sulfur dioxide

• Helium and hydrogen

What significant event occurred 3.8 billion years ago?

• The appearance of liquid water

• The Cambrian Explosion

• The emergence of the first continents

• The formation of the Moon

What were the first forms of life on Earth?

• Dinosaurs

• Microscopic organisms

• Plants

• Fish

What was the name of the first supercontinent?

• Gondwana

• Vaalbara

• Rodinia

• Pannotia

What type of organisms evolved around 2.4 billion years ago?

• Reptiles

• Mammals

• Cyanobacteria

• Dinosaurs

What major climatic event occurred due to the rise of oxygen in the atmosphere?

• The first ice age

• The Cambrian Explosion

• The formation of the Moon

• The emergence of land animals

What was the name of the supercontinent that formed after Rodinia?

• Pannotia

• Vaalbara

• Laurasia

• Gondwana

During which period did the Cambrian Explosion occur?

• 540 to 485 million years ago

• 1.1 billion years ago

• 2.4 billion years ago

• 3.3 billion years ago

What was a significant consequence of the Ordovician-Silurian extinction?

• The formation of the first trees

• The disappearance of trilobites

• The rise of mammals

• The emergence of dinosaurs