GED Social Studies TestGeography and the WorldMedium
A geographer is analyzing a map that uses different shades of green to represent varying levels of forest cover across a country, with darker shades indicating denser forests. This type of map, which uses color intensity to display quantitative data for predefined areas, is known as a:
- ACartogram
- BChoropleth map
- CIsoline map
- DDot distribution map
Show answer & explanationAnswer & explanation
Correct answer: B. Choropleth map
A choropleth map specifically uses variations in shading or patterns within predefined geographic areas (like states or provinces) to represent the average value of a particular quantity in those areas, matching the description of forest cover by shades of green.
Why the other options are wrong
- A. A cartogram distorts geographic size based on a variable, not color intensity for predefined areas.
- C. An isoline map uses lines to connect points of equal value (e.g., elevation, temperature).
- D. A dot distribution map uses dots to show the presence or density of a feature.
Choropleth Map
A thematic map in which areas are shaded or patterned in proportion to the measurement of the statistical variable being displayed on the map, such as population density or per capita income.
- Uses color intensity or patterns.
- Applies to predefined geographic areas.
- Displays quantitative data.
Memory trick: Maps show location, but thematic maps tell a story with data.