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How do fish sink and float?

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Have you ever wondered why most fish never sink to the bottom of the ocean and float to the surface of the water? How is it that they can remain so perfectly buoyant underwater? I wonder how it works? Let’s find out.

Subsections of the Model CurriculumLearning objectives
2.2 animals3.2.2.2 distinguish animals by habitat
  • Plastic bottle - 1 pc.
  • Silicone hose - 0.5 meter
  • Stones or coins (heavy items)
  • Insulating tape or tape
  • Balloon - 1 pc.
  • Elastic band - 1 pc.
  • A large bowl of water
  • Scissors

Course Content