# Does lower or higher density sink?

## Does lower or higher density sink?

If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.

Why some objects float on the water and some sink?

Density plays a part in why some things float and some sink. Objects that are more dense than water sink and those less dense float. Hollow things often float too as air is less dense than water. When an object floats, it pushes water out of the way ( displacement ).

### How is density related to sinking and floating?

Students are introduced to the concept of density and that density has to do with how heavy something is relative to its size. Students are also introduced to the idea that whether a substance sinks or floats in water is a characteristic property of that substance and does not depend on the amount of the substance.

What makes an object float or sink in water?

Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float. Density is a characteristic property of a substance and doesn’t depend on the amount of substance.

#### How does the density of a liquid affect its float?

1 Since density is a characteristic property of a substance, each liquid has its own characteristic density. 2 The density of a liquid determines whether it will float on or sink in another liquid. 3 A liquid will float if it is less dense than the liquid it is placed in. 4 A liquid will sink if it is more dense than the liquid it is placed in.

How is density a characteristic of a substance?

Students will also be able to explain that density is a characteristic property of a substance. Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.