What is an isotherm?

What is an isotherm?

• A. An equal line of temperature
• B. An equal line of wind speed
• C. A line of equal humidity
• D. A line of equal precipitation

Answer: (A)

An isotherm is a line on a map that connects points where the air temperature is the same. It lets you quickly see how temperature changes across an area—where lines are close together, temperature changes quickly, and where they’re far apart, changes are slower. On weather maps you’ll see different isotherms for various temperatures (like 0°C, 10°C, 20°C, etc.), helping to identify warmer and cooler air masses. This concept is about temperature specifically, not wind speed, humidity, or precipitation, which would be shown with different kinds of lines or symbols.

An isotherm is a line on a map that connects points where the air temperature is the same. It lets you quickly see how temperature changes across an area—where lines are close together, temperature changes quickly, and where they’re far apart, changes are slower. On weather maps you’ll see different isotherms for various temperatures (like 0°C, 10°C, 20°C, etc.), helping to identify warmer and cooler air masses. This concept is about temperature specifically, not wind speed, humidity, or precipitation, which would be shown with different kinds of lines or symbols.