| A | B |
| continental shelf | plateau off the continent that lies under the ocean for several miles |
| relative location | description of where a place is in relation the features around it |
| tropics | area between the Tropic of Cance and the Tropic of Capricorn |
| atmoshpere | layer of oxygen and other gasses that surround the earth |
| Global Positioning System | a group of satellites that uses radio signals to determine the exact location of places on Earth |
| erosion | process by which weathered bits of rock are moved elsewhere by water, wind, or ice |
| Summer Solstice | day that has the most daylight hours and fewest hours of darkness |
| century | 100 year period |
| geothermal energy | energy produced by the heat found below the Earth's crust |
| geography | study of the Earth and its people |
| aquifer | underground layer of rock |
| physical features | land and water areas of the Earth |
| conservation | careful use of resources |
| location | the position of a place on the Earth's surface |
| crop rotation | planting a different crop in the same field so the soil stays fertile |
| local wind | wind pattern typical to a small area |
| ecosystem | place shared by plants and animals that depend on one another |
| climate | patter of weather that takes place over many years |
| acid rain | chemicals from air pollution that combines with precipitation |
| place | the characteristics of a location that make it unique |
| absolute location | exact spot where a place is found |
| movement | how and why people, goods, and ideas move from place to place |
| regions | areas on Earth's surface that have common characteristics |
| decade | period of 10 years |
| human-environment interaction | how people affect their natural surrounding and how their surrounding affect them |