So when I put ice in water in a glass and the ice melts why doesn’t the glass overflow? Explanation:Ice Floats: Ice is less dense than liquid water, which is why it floats. When the ice is in the glass, it displaces a volume of water equal to the weight of the ice.Melting Process: When the ice melts, it turns into water. The volume of water produced from the melting ice will exactly equal the volume of water that was displaced by the ice while it was floating. Therefore, the water level does not rise when the ice melts; it stays the same.So if all the icebergs melted today why do people think the oceans will rise? Post navigation Petunia Where is this now???