Some things float because they are lighter than water, and others sink because they are heavier. Imagine you're in a bathtub. If you drop a rubber duck in the water, it floats because it’s not as heavy as the water it pushes aside. But if you drop a rock, it sinks because it's much heavier than the water it displaces.
Examples
- A stone sinks because it is denser than the water.
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See also
- What Causes the Northern Lights?
- How Does a Mirror Work Exactly?
- How Does Gravity Affect the Moon’s Orbit?
- What Causes a ‘Golden’ Sunset or Sunrise?
- How Does Gravity Affect Space Travel?