| A | B |
|---|
| geography | the study of the Earth and its people |
| absolute location | the exact spot on Earth where a geographic feature is found |
| relative location | describes where that feature is in relation to the features around it |
| environment | natural surroundings |
| decade | a period of 10 years |
| century | a period of 100 years |
| millennium | a period of 1000 years |
| Global Positioning System | This system uses radio signals to determine the exact location of places on Earth |
| Geographic Information System | computer hardware and software that gather, store, and analyze geographic information and then display it on a screen |
| theme | topics |
| physical | related to natural science |
| solar system | the sun, planets, and smaller bodies that revolve around it |
| orbit | planet's path around the sun |
| revolution | a complete circuit around the sun |
| leap year | a year that contains an extra day |
| rotate | planet spins on its axis |
| axis | imaginary line that passes through the center of the Earth from the North to the South Pole |
| atmosphere | the layer of oxygen and gases that surrounds Earth |
| summer solstice | the day with the most hours of sunlight and the beginning of summer |
| winter solstice | the day with the fewest hours of sunlight and beginning of winter |
| equinox | when day and night are of identical, or equal, length in both hemispheres |
| Tropics | the low-latitude areas near the Equator between the Tropic of Cancer and the Tropic of Capricorn |
| significant | important |
| reverse | opposite |
| identical | equal |
