Understanding Density and Buoyancy

Why does a piece of clay sink in water?

• Because its density is lower than water

• Because its density is higher than water

• Because it is heavier than water

• Because it is lighter than water

What determines whether an object will float or sink in a liquid?

• The shape of the object

• The density of the object

• The temperature of the liquid

• The color of the object

How is the success of the clay boat measured in the activity?

• By its size

• By its ability to carry 10 pieces of rounded clay

• By its speed in water

• By its color

What question might help students understand why ships float?

• What is the color of the ship?

• How fast can the ship move?

• What is the temperature of the water?

• Does changing the volume of the ship affect its buoyancy?

Why do ships made of steel float while a single piece of steel sinks?

• Because ships are heavier

• Because ships are smaller

• Because ships are hollow and have a larger volume

• Because ships are painted