Substance A has a density of 1.7 g/cm³. Substance B has a density of 1.7 kg/m³. Without doing any calculations, determine which substance is more dense.

Density is defined as mass per unit volume, typically expressed in units such as grams per cubic centimeter (g/cm³) or kilograms per cubic meter (kg/m³). It is a crucial property that helps in comparing the compactness of different substances. A higher density indicates that a substance has more mass in a given volume, which is essential for determining buoyancy and material properties.

Unit conversion is the process of converting a measurement from one unit to another, which is vital in comparing quantities expressed in different units. In this case, converting the density of Substance B from kg/m³ to g/cm³ is necessary to make a direct comparison with Substance A. Understanding how to convert between these units allows for accurate assessments of density.

When comparing densities, it is important to ensure that both substances are expressed in the same units. This allows for a straightforward determination of which substance is denser. In this scenario, recognizing that 1.7 g/cm³ is significantly greater than 1.7 kg/m³ (after conversion) is key to concluding which substance is more dense without performing calculations.