Latitude is a map coordinate that tells how far north or south a place is from the Equator. It matters because latitude strongly affects how much sunlight a region receives during the year. Places near the Equator usually get more direct sunlight, while places near the poles get sunlight at lower angles.
This pattern helps explain why Earth has tropical, temperate, and polar climate zones.
Key Facts
- Latitude measures distance north or south of the Equator in degrees, from 0° to 90°.
- The Equator is 0° latitude and receives the most direct sunlight on average.
- Higher latitude usually means lower average temperature because sunlight strikes at a lower angle.
- Earth's main climate bands are tropical, dry, temperate, continental, and polar, but latitude is only one factor.
- Sun angle affects energy per area: direct rays concentrate energy, while slanted rays spread energy over a larger surface.
- Approximate latitude zones: tropical 0° to 23.5°, temperate 23.5° to 66.5°, polar 66.5° to 90°.
Vocabulary
- Latitude
- Latitude is the angular distance north or south of the Equator, measured in degrees.
- Equator
- The Equator is the imaginary line at 0° latitude that divides Earth into the Northern and Southern Hemispheres.
- Climate zone
- A climate zone is a region with similar long-term patterns of temperature, precipitation, and seasonal conditions.
- Sun angle
- Sun angle is the angle at which sunlight strikes Earth's surface, affecting how concentrated solar energy is.
- Tropic
- A tropic is one of the two latitude lines at about 23.5° north or south where the Sun can be directly overhead at certain times of year.
Common Mistakes to Avoid
- Confusing latitude with longitude is wrong because latitude lines run east-west and measure north-south position, while longitude lines run north-south and measure east-west position.
- Assuming latitude is the only cause of climate is wrong because elevation, ocean currents, winds, landforms, and distance from water also affect climate.
- Thinking the Equator is hottest every day everywhere along it is wrong because clouds, rainforests, oceans, and altitude can change local temperatures.
- Reading 30°N and 30°S as the same location is wrong because they are on opposite sides of the Equator, even though they are the same distance from it.
Practice Questions
- 1 A city is located at 15°N. Is it in the tropical, temperate, or polar latitude zone if the tropical zone extends from 0° to 23.5°? Explain using its latitude.
- 2 Two cities are located at 5°S and 60°N. How many degrees of latitude apart are they, and which one is likely to receive more direct sunlight on average?
- 3 A coastal city at 45°N has a milder winter than an inland city at 45°N. Explain why two places at the same latitude can have different climates.