Relative Density

Front

What is relative density?

Back

Relative density is a measure of how dense an object is compared to the density of a reference substance, usually water.

Front

If an object sinks in water, what can we say about its density?

Back

If an object sinks in water, it is more dense than water.

Front

If an object floats in water, what can we say about its density?

Back

If an object floats in water, it is less dense than water.

Front

What does it mean if a material is described as 'less dense'?

Back

Less dense means that the material will float in water.

Front

What does it mean if a material is described as 'more dense'?

Back

More dense means that the material will sink in water.

Front

Give an example of a material that is more dense than water.

Back

A copper penny is more dense than water.

Front

Give an example of a material that is less dense than water.

Back

Styrofoam is less dense than water.

Front

What happens to a rock when placed in water?

Back

A rock sinks in water because it is more dense than water.

Front

What is the relationship between density and buoyancy?

Back

Density affects buoyancy; objects less dense than the fluid will float, while those more dense will sink.

Front

What is the term for an object that floats?

Back

An object that floats is described as being less dense.