Question

Lines joining equal rainfall are called ________________

• A. isotherms
• B. isorains
• C. isobars
• D. isohyets

Hint:

Remember these key meteorological isolines:
- Rainfall = Isohyets
- Temperature = Isotherms
- Pressure = Isobars
- Wind Speed = Isotachs
- Sunshine = Isohels

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
In meteorology and geography, isolines (or contour lines) are drawn on maps to connect points that have equal values of a specific parameter.

Step 2: Detailed Explanation:
Let us define the scientific terms for the listed isolines:
- Isohyet (D): A line drawn on a map connecting points that receive equal depths of rainfall over a given period.
Isohyetal maps are used in hydrology to estimate the average rainfall depth over a catchment.
- Isotherm (A): A line connecting points with equal temperatures.
- Isobar (C): A line connecting points with equal atmospheric pressures.
- Isorains (B): This is a non-standard term and is not used in scientific meteorological reporting.
Therefore, lines connecting points of equal rainfall are called isohyets.

Step 3: Final Answer:
Lines joining points of equal rainfall are called isohyets.