Which term describes lines that connect points of equal value on a map?

• A. Symbols
• B. Grid
• C. Isopleths
• D. Spot height

Answer: (C)

Isopleths are lines that connect points with the same value on a map. They form a way to show how a continuous variable, like temperature, pressure, rainfall, or elevation, changes over space by linking all locations that share equal values. This makes gradients and patterns easy to read at a glance. For elevation, these lines are often called contour lines, a specific case of isopleths. The other terms describe different map features: symbols are marks for features, a grid is the coordinate framework, and a spot height is a single measured point, not a connecting line.