Find out how density is defined for the study of chemistry.

See how different solids can have different densities depending on their molecular make-up.

See how different liquids can have different densities depending on their molecular make-up.

Three great maps of Sri Lanka on one page. You can see the ethnic groups and religions on one map, the population density of the country on another, and the land use and economic activity on the third. From the Perry-Castaneda Collection

This lesson will introduce the concept of density and show how to calculate the density of an object.

An introduction to the definition and formula of density, complete with real world examples of objects with different densities.

A short exercise explaining the formula for volumetric density followed by several practice problems and examples.

Discover how the molecular make-up of water affects its density.

Learn how the molecular movement in different temperature water affects the density of the liquid.

This lesson will define density as mass/volume and provide relevant real world examples of objects with varying densities. It is 2 of 3 in the series titled "Definition of Density."

This lesson will demonstrate how to calculate density to the correct number of signficant figures using experimental measurements. It is 2 of 3 in the series titled "Density Calculations."

This lesson will demonstrate how to calculate density to the correct number of signficant figures using experimental measurements. It is 3 of 3 in the series titled "Density Calculations."

A map showing the population density of Spain from the online edition of Encyclopedia Britannica.

A wonderful site for information on polythene. Contains a table of information for high density and low density polyethylene (LDPE and HDPE) which tells melting point, uses, chemical properties, and more for each. Also contains the...

An in-depth look at how isostasy works and the processes taking place during glaciation and the melting of glaciers. Looks at gravity and the effects of density differences within the crust and mantle, and at Earth's magnetic field and...

A map showing the population density of Africa in 1916 showing density ranges from under 2 inhabitants to areas along the Nile River valley and delta of more than 512 inhabitants per square mile.

A map from 1915 of Africa and Madagascar showing the population density of the region at the time. This map is keyed to show areas of population densities ranging from under 2 inhabitants per square mile to areas of over 512 inhabitants...

A map from 1910 showing the political boundaries and the distribution of population density of Asia at the time. This map uses gradated shading to shows areas of population densities ranging from under 2 inhabitants per square mile to...

A map from 1915 of Australia showing the population density of the region at the time. This map is keyed to show areas of population densities ranging from under 2 inhabitants per square mile to areas of over 128 inhabitants per square...

A map from 1910 of population density in Europe, keyed to show area density ranges from under 2 to over 512 inhabitants per square mile, and cities with over 500,000 inhabitants.

A map from 1910 of North America, Central America, Greenland and the Caribbean showing population density distribution in the region at the time. The map is coded to show areas of population densities ranging from less than 1 inhabitant...

A map from 1911 of South America showing the population density across the region. The map is color-coded to show areas of population densities ranging from under 2 persons per square mile to over 256 persons per square mile. A chart at...

A map showing the population density of South America around 1910. The map shows the regions where population density ranges from under two inhabitants per square mile to regions of population over 512 inhabitants per square mile. Cities...

A map from 1898 showing the density of population in the contiguous 48 states at the time. The map is coded to show areas of density ranging from sparsely populated to areas of dense population. "The eastern half of the United States...