Density Year 3

What does it mean when an object floats in water?

• The object is heavier than water

• The object is lighter than water

• The object disappears in water

• The object turns into water

Which of these objects will sink in water?

• A rubber ball

• A paper boat

• A metal key

• A piece of sponge

Why does a wooden log float in water?

• Because it is small

• Because it is less dense than water

• Because it has a smooth surface

• Because it is made of wood

Which of these objects will most likely float on water?

• A rock

• A plastic bottle

• A coin

• A glass cup

What happens if you put a ball of clay into water?

• It will float

• It will sink

• It will dissolve

• It will bounce on the water

If an object sinks in water, it means that…

• It is filled with air

• It is heavier than water

• It is the same weight as water

• It is made of plastic

Which of the following is true about floating and sinking?

• All small objects float, and all big objects sink

• Objects that are more dense than water will sink

• Only metal objects sink in water

• Floating and sinking depend only on an object’s weight