Understanding Density and Buoyancy

What determines whether an object will sink or float in water?

• The color of the object

• The shape of the object

• The temperature of the water

• The density of the object

Why does the aluminum boat sink after a hole is cut in it?

• Because it is more dense than water

• Because it changes color

• Because it becomes heavier

• Because it is less dense than water

What happens to the styrofoam boat when a hole is cut in it?

• It becomes more dense

• It changes color

• It floats and returns to the surface when pushed down

• It sinks immediately

What is a common myth about changing the shape or size of a material?

• It changes the weight of the material

• It changes the density of the material

• It changes the temperature of the material

• It changes the color of the material

Which material is less dense than water, allowing it to float even with a hole?

• Aluminum

• Copper

• Steel

• Styrofoam