Question

If you fill a glass to the brim with ice water and the ice melts, what will happen?

Answer 1

Answer:

The water level will drop slightly as the ice melts.

Explanation:

One interesting property of water is that it achieves maximum density as a liquid, not as a solid. So, ice is less dense than water and floats. When it melts, it becomes more dense. More mass per unit volume means the level of the liquid drops slightly.

Answer 2

So the added volume is the same, so the level of the water will not change.

The water level remains the same when the ice cube melts. A floating object displaces an amount of water equal to its own weight. Since water expands when it freezes, one ounce of frozen water has a larger volume than one ounce of liquid water.