The Story of the World's Favorite Fossil

What type of ancient marine animal was Orthoceras?

• A type of fish

• A large dinosaur

• An early cephalopod

• A prehistoric plant

During which geological era did Orthoceras live?

• Cambrian Era

• Ordovician Era

• Jurassic Era

• Cenozoic Era

What physical feature helped Orthoceras become a successful predator and also contributed to its abundance in the fossil record?

• Its large eyes

• Its ability to camouflage

• Its hard shell

• Its fast swimming speed

How did Orthoceras move through the ancient seas?

• By crawling along the ocean floor

• By using fins to swim

• By propelling itself with jets of water

• By floating with ocean currents