Mysterious Ocean Sound Quiz

In what year was the mysterious sound first heard in the Pacific Ocean?

• 2005

• 1997

• 1995

• 2000

What was the mysterious sound recorded by NOAA called?

• The Echo

• The Hum

• The Whistle

• The Roar

What equipment did NOAA use to record the mysterious sound?

• Hydrophones

• Seismic sensors

• Sonar devices

• Underwater cameras

What is one theory about the origin of the mysterious sound?

• A ship's engine

• A giant sea creature

• Underwater volcanic activity

• A large iceberg

Why is it difficult to determine the origin of the mysterious sound?

• The ocean is largely unexplored

• The sound was too short

• The sound was too faint

• The recording was lost