Density

Front

What is the definition of density?

Back

Density is how compact the molecules are in an object/substance.

Front

What happens to the density of a balloon if its volume is doubled while mass remains unchanged?

Back

The density is cut in half.

Front

Why do helium balloons rise on Earth?

Back

Helium is less dense than air.

Front

What happens to the volume of a substance as it is cooled?

Back

The volume decreases.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

Front

If an object has a mass of 10 kg and a volume of 2 m³, what is its density?

Back

Density = 10 kg / 2 m³ = 5 kg/m³.

Front

What is the unit of density in the SI system?

Back

The unit of density is kilograms per cubic meter (kg/m³).

Front

How does temperature affect the density of most substances?

Back

As temperature increases, density usually decreases.

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.

Front

What is the density of water at 4°C?

Back

The density of water at 4°C is approximately 1,000 kg/m³.