Choropleth maps are the fancy name given to maps which show information using colour.
In the example below, different shades of one colour are used to show the population density. This is the number of people that live in an area. The darker shades represent high numbers of people in an area and the lighter shades represent low numbers of people.
A choropleth map needs a key to explain what the different shades mean.
Compare the map above the population density map at the top of the page. Name the continents that fit the following descriptions: