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Bouyancy. A Boat/ship is hollowed out to be use to passengers, were as rocks are solid and have a lot less buoyancy.

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Q: Why does a small rock sink and a boat float?
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How can a boat float and don't sink?

because the boat is made out of stuff that can float


What will sink float or suspend?

A boat


Does anorthite float or sink?

This is ROCK so it will SINK


Do all rocks sink?

It depends on the type of rock. A rock like sandstone would not sink if it is a small peice. Small rocks can float. That's when its called silt.


How does the shape of the boat effect it to sink or float?

The science is called "displacement". If the shape of the boat allows the amount of the boat in the water to be less weight than the water it displaces it will float. If the amount of the boat in the water weighs more than the water it displaces it will sink.


What type of rock cannot float on water?

Virtually all types of rock will sink in water. The only rock that can float on water is pumice.


Does Anorthite sink or float in water?

It will float. Its a rock. It actually depends on how much water you have, if you you tried float it in the ocean, it would obviously sink. But if you tried to float it on a gladd or bowl or water, it would float,


What makes boat a sink?

Different things. For example, the Titanic sank because it hit an iceberg. Other ships sink because the weight on it is too heavy. It also depends on how sturdy the ship or boat is. If it is a handmade small boat, jump on it- and it will sink. if it is medium or big, someting like a rock or an iceberg can sink it.


If you use a smalll amount of plasticine to make a large boat shape it will float but if you use a small paice then it will sink Why is this?

ducks go quack.........lol


What is the material that can float and not easy to sink?

Pumice rock will float unless water fills most of the small air pockets. Wood may also be dense enough to sink when waterlogged. Styrofoam and similar materials cannot sink because they are less dense than water.


Do all small objects float or sink?

yes


Do material and shape affect buoyancy of a toy boat?

Yes it does because depending on the materials of the boat and how much their mass is can change the buoyancy of the toy boat. Boat can be designed to have less volume in order for it to have less density and be able to float. So if the material's mass is alot if can make the boat sink. If the material's mass is not alot then it can help the boat float. If the shape is designed to have more volume than mass it will float. If not then it will sink.