Why Do Some People Float While Others Sink in Water?

Imagine you're like a balloon: if you're filled with air, you float up. If you're full of water, you sink down. Your body is like a big, soft balloon, some people have more air inside them (like when they take deep breaths), so they float easier. Others might be like balloons that are mostly full of water, they sink faster. That's why some people float and others don't.

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Examples

  1. A little boy floats on his back like a lazy duck
  2. His brother dives underwater and sinks immediately
  3. The pool is full of happy swimmers, some up high, others lower down

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Categories: Science · buoyancy· density· water· science· physics