Density

Front

What is density?

Back

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

Front

Why does ice float on water?

Back

Ice floats on water because solid water (ice) is less dense than liquid water.

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.

Front

What is the unit of measurement for density?

Back

The unit of measurement for density is typically grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³).

Front

How does temperature affect the density of liquids?

Back

Generally, as temperature increases, the density of liquids decreases because the molecules move apart.

Front

What happens to the density of a substance when it is compressed?

Back

When a substance is compressed, its density increases because the mass remains the same while the volume decreases.

Front

What is the formula for calculating density?

Back

Density = Mass / Volume.

Front

Why do helium balloons rise in the air?

Back

Helium balloons rise because helium is less dense than the surrounding air.

Front

What is the effect of adding salt to water on its density?

Back

Adding salt to water increases its density, allowing objects that would normally sink to float.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, while weight is the force exerted by gravity on that mass.