| North of the ____ Circle, it is light for 24 hours on June 21. |
Antarctic |
| South of the ____ Circle, it is dark for 24 hours on June 21. |
Appalachians |
| Earthquake magnitudes are measured on the ____ scale (1-9). |
Arctic |
| The ____ is under the Pacific Ocean bordering South America. |
Cancer |
| The equator is 0° latitude, whereas the ____ is 0° longitude. |
Capricorn |
| The Himalayas are growing, whereas the ____ are eroding. |
Nazca Plate |
| The Tropic of ____ is about 23.5° south latitude. |
Prime Meridian |
| The Tropic of ____ is about 23.5° north latitude. |
Richter |
