Final answer:
To rank objects by density, calculate the mass-to-volume ratio for each and compare these values. The object with the highest ratio has the greatest density and is ranked first, while the lowest is ranked last.
Step-by-step explanation:
To rank the densities of the objects from greatest to least, we first need to understand the definition of density, which is the mass of an object divided by its volume. Density can be expressed using the formula:
Density = Mass / Volume
Once we have the densities calculated, we compare them to each other. The object with the highest mass-to-volume ratio will have the greatest density and thus will be ranked first. Conversely, the object with the lowest mass-to-volume ratio will have the least density and will be ranked last. In the case where you have not provided the specific objects or their mass and volume, recall that materials like osmium and iridium are extremely dense, while materials like cork and aerogel are much less dense.
The process would generally involve calculating the density for each material using the above formula and then listing them in descending order according to the numerical values obtained.
It's crucial to use the same units for mass and volume when comparing densities to ensure an accurate ranking.