Molluscs: Nautilus Regulates Its Buoyancy

Scientists discovered the key to nautilus buoyancy when they X-rayed the shell of living mollusks. An educational video shares these X-rays and explains how the process works. It connects evolutionary changes, a unique circulatory system, and the benefits of buoyancy for the nautilus.

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CCSS: Adaptable
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Instructional Ideas
  • Compare the buoyancy of a nautilus and a submarine
Classroom Considerations
  • Relies on prior knowledge of buoyancy
  • Video permits streaming, downloading, and sharing as needed for educational purposes
  • Designed to meet the Benchmarks for Science Literacy for middle school
  • Requires very little class time, so it's easy to work into a lesson plan
  • None