| A | B |
|---|
| Aphelion | The point at which the earth is farthest from the sun |
| Perihelion | The point at which the earth is closest to the sun |
| Lines of longitude | Imaginary lines that run north and south across the earth |
| Lines of latitude | Imaginary lines that run east and west across the earth |
| Coriolis effect | The way in which the rotation of the earth bends the path of winds, sea currents, and objects that fly through different latitudes |
| Air mass | A large body of air with relatively uniform pressure, temperature, and humidity |
| Weather front | A boundary between two air masses |
