Upthrust
Lesson 7 / 9
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Lesson outcome
I can describe how pressure changes with depth and causes upthrust.
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The pressure in a fluid increases with depth because the weight of fluid above pushes particles closer together.
The pressure on an object in a fluid pushes with more force on the lower part of it and causes upthrust.
An object floats in water if its density is less than that of water.
The density of a material increases with the mass of each particle and the closeness of its particles.
Ice is less dense than water as its crystal structure fixes the particles further apart than they are in water.
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