GED Social Studies TestGeography and the WorldEasy
A geographer is analyzing a map that displays the average annual rainfall distribution across a continent using lines connecting points of equal rainfall. What type of map is the geographer using?
- APolitical Map
- BRoad Map
- CIsoline Map
- DTopographic Map
Show answer & explanationAnswer & explanation
Correct answer: C. Isoline Map
An isoline map uses lines to connect points of equal value. In this case, lines connecting points of equal rainfall are called isohyets, a specific type of isoline.
Why the other options are wrong
- A. A political map shows boundaries and cities, not rainfall.
- B. A road map shows transportation routes, not rainfall distribution.
- D. A topographic map shows elevation using contour lines, not rainfall.
Isoline Map
A type of map that uses lines to connect points of equal value, illustrating continuous distributions like elevation, temperature, or precipitation.
- Lines connect points of equal value
- Used for continuous data (e.g., elevation, temperature, pressure)
- Examples include isotherms (temperature), isobars (pressure), isohyets (rainfall)
Memory trick: Map lines of equal value, isoline is the view.