Secrets of the Ocean Quiz

What percentage of the Earth's surface is covered by oceans?

• 50%

• 71%

• 65%

• 80%

What is the name of the mysterious underwater structure near Yonaguni Jima, Japan?

• Bermuda Triangle

• Yonaguni Ruins

• Atlantis

• Lemuria

How deep is the Marianas Trench?

• 15,000 meters

• 8,000 meters

• 20,000 meters

• 11,000 meters

What is the approximate depth of the Marianas Trench in feet?

• 30,000 feet

• 25,000 feet

• 40,000 feet

• 36,000 feet

Why haven't we been able to explore the Marianas Trench?

• Too dangerous

• Too cold

• Too deep

• Too dark

What is the Baltic Sea structure described as?

• A shipwreck

• A coral reef

• A natural formation

• A strange object

What is one reason we know more about outer space than our oceans?

• Space has more technology

• Oceans are less interesting

• Space is easier to explore

• Oceans are unexplored

What type of structures are found at the bottom of the ocean near Yonaguni Jima?

• Coral reefs

• Stone structures

• Shipwrecks

• Natural caves

What is the main theme of the text?

• Marine biology

• Exploration of space

• History of the Earth

• Mysteries of the ocean

What is the significance of the structures found in the ocean?

• They are military bases

• They are ancient cities

• They are natural formations

• They are tourist attractions