Ocean Through Time: A Journey Through Earth's Marine History Quiz

What was the primary composition of Earth's early atmosphere?

• Oxygen, nitrogen, and carbon dioxide
• Methane, carbon dioxide, and hydrogen sulfide
• Nitrogen, argon, and oxygen
• Carbon monoxide and sulfur dioxide

What significant event occurred approximately 2.3 billion years ago?

• The formation of the first supercontinent
• The emergence of cyanobacteria
• The Cambrian Explosion
• The Great Dying

Which of the following organisms is known as the 'T-rex of the Cambrian'?

• Shark

• Hurdia victoria
• Armor plated fish

• Trilobites

What was a major consequence of the Permian extinction?

• Rise of marine mammals
• Formation of modern oceans
• Loss of 90% of marine species
• Emergence of complex marine ecosystems

What type of marine life dominated the Paleozoic oceans?

• Marine mammals
• Sharks

• Invertebrates
• Coral reefs

What was the primary cause of the K/Pg extinction event?

• Volcanic activity
• Asteroid impact
• Climate change
• Ocean acidification

Which marine reptiles emerged during the Mesozoic era?

• Ichthyosaurs and plesiosaurs
• Trilobites and ammonites
• Cyanobacteria and corals
• Jawless fish and bony fish

What adaptation did early whales develop in response to environmental changes?

• Filter feeding
• Photosynthesis
• Bilateral symmetry
• Hard shells

What was the significance of the Avalon Explosion?

• First multicellular life forms appeared
• First vertebrates evolved
• The rise of marine mammals
• Formation of the first coral reefs

What ecological role did rudist clams play during the Mesozoic?

• Predators of fish
• Reef builders
• Filter feeders
• Decomposers