Physics Question of the Day

I believe the water level would go down compared to the rocks being in the boat. It would seem the hull of the boat has more surface area and would displace more water with the rocks in it, than the rocks just being in the water. Sounds good anyway. lol

Yup. The boat floats and so is displacing an amount of water equal to the weight of the stones. If the stones sink, they're displacing less water than they weight, which is less than when they're in the boat which is why they.. sink.