Difference between floating and sinking object

A Floating object is less dense and therefore reaches the top of the water causing it to float.

A sinking object is heavier which means it is dense and therefore it will sink to the bottom.

Explanation:

If you compare a rock and an ice cube:

They are both solids, the rock will sink because it has a heavier mass than ice (more dense). The ice cube will float because it is lighter and will sit on the surface tension of the water (less dense).

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