Density is the ratio of an object's mass to its volume: $\rho = \frac{m}{V}$

Kilograms per cubic meter ($kg/m^3$) and grams per cubic centimeter ($g/cm^3$).

An intensive property doesn't change with the amount of substance. Density is an intensive property.

The ratio of a substance's density to the density of a reference substance (usually water).

The object will sink in water.

The object will float in water.

The object floats.

The object sinks.

The density increases.

The density decreases.

It becomes less dense and forms ice because of the open space between molecules.

1. Measure the mass (m) of the object.
2. Measure the volume (V) of the object.
3. Divide the mass by the volume: $\rho = \frac{m}{V}$

1. Fill a graduated cylinder with a known volume of water.
2. Submerge the object completely in the water.
3. Measure the new water level.
4. Subtract the initial water level from the final water level to find the volume of the object.

1. Measure the radius (r) of the circular base.
2. Measure the height (h) of the cylinder.
3. Calculate the area of the base: $A = \pi r^2$.
4. Multiply the base area by the height: $V = A \cdot h = \pi r^2 h$.

1. Gather materials: Container of water, container of ice, balance, graduated cylinder.
2. Measure the mass and volume of both the water and ice.
3. Calculate the densities using $\rho = \frac{m}{V}$.
4. Compare the densities of ice and water.