KS3 Density

Front

What is density?

Back

Density is the mass of an object divided by its volume, typically expressed in grams per cubic centimeter (g/cm³).

Front

How do you calculate density?

Back

Density = Mass / Volume.

Front

What is the unit of measurement for density?

Back

The unit for density is grams per cubic centimeter (g/cm³).

Front

Why do helium balloons rise in air?

Back

Helium balloons rise because helium is less dense than air.

Front

If an object has a mass of 10g and a volume of 5cm³, what is its density?

Back

Density = 10g / 5cm³ = 2 g/cm³.

Front

What happens to the density of an object if its mass increases while its volume remains constant?

Back

The density of the object increases.

Front

What happens to the density of an object if its volume increases while its mass remains constant?

Back

The density of the object decreases.

Front

What is the density of water?

Back

The density of water is approximately 1 g/cm³.

Front

If a rock has a mass of 14g and a volume of 2cm³, what is its density?

Back

Density = 14g / 2cm³ = 7 g/cm³.

Front

What is the relationship between density and buoyancy?

Back

An object will float if it is less dense than the fluid it is in; it will sink if it is more dense.