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Interactive Grade 6 Science Density & Buoyancy Worksheet — Density & Buoyancy Practice

1.

Why does adding salt to water change whether an object floats or sinks?

A.It increases the density of the water.B.It decreases the density of the water.C.It makes the object heavier.D.It makes the object smaller.

2.

A beach ball is pushed underwater, but it pops back up to the surface. Why?

A.The ball is denser than waterB.The air inside makes the overall density of the ball less than waterC.The water is pushing down on the ballD.The ball has no mass

3.

Why do giant steel ships float in the ocean?

A.The steel is actually very lightB.The shape of the ship displaces a large volume of waterC.The ship is filled with heavy cargoD.The ocean water is less dense than the ship