Density (conceptual) | Middle school chemistry | Khan Academy

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   • Middle school chemistry | Khan Academy  

Density reveals how much mass is packed into a given volume. Different substances have different densities. Water’s density is 1.0 g/cm³, meaning any material with a density higher than this will sink in water, while lower densities float. Since each substance has a consistent density, this property helps identify materials and explain why some objects are “light” or “heavy” for their size.

00:00 A ton of bricks vs a ton of feathers
01:32 What is density?
04:18 Density values of common materials
04:45 Check your understanding of density
05:42 Water, floatation, & neutron stars
07:00 Summary


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