Discussion
An ice cube is floating on the surface of water: How will the water level be affected by melting of this ice cube?
Answer: C
The water level remains the same.
A floating ice cube displaces its own weight of water. When it melts it becomes exactly that weight of water, which occupies exactly the volume it was displacing, so the level does not change. This is why melting sea ice does not by itself raise sea level, whereas melting land ice does.
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