| Term | Definition |
| Winter Solstice | Shortest Day of the year |
| Summer Solstice | Longest Day of the year |
| Equinox | Days and Nights are equal lengths |
| Tropic of Cancer | 23 1/2 Degrees North of the Equator |
| Tropic of Capricorn | 23 1/2 Degrees South of the Equator |
| Air Pollution | Burning Fossil Fuels causes this |
| Commercial | type of Agriculture where your goal is mass quantity and profit |
| Subsistence | Type of Agriculture where you make just enough for you (family) |
| Population Density | Number of people per square mile |
| GNP | $$ Amount of goods and services for a country (abreviation) |
| Tornado | Swirling storm that forms over land |
| Hurricane | Swirling storm that forms over water |
| Tsunami | Large wave caused by movement of underwater plates |
| Cultural Diffusion | Movement of one culture to another (example: McD's in Japan!) |
| Per Capita Income | Amount of money a country make (per person) |
| Standard of Living | Quality of life for an individual (based on WHERE you live) |
| Renewable Resource | Trees, Cows, Water |
| Non-Renewable Resource | Oil, Coal, Minerals, Natural Gas |
| Biosphere | Sphere where all the Earh's life is located |
| Troposphere | Sphere where all the Earth's weather is located |
| Lithosphere | Sphere where no life can be sustained |
| Relative Location | "Approximate" position on the globe |
| Absolute Location | "Exact" location on the globe |
| Climate | Weather Patterns for an area over a long period of time |
| Weather | Atmospheric conditions at any given moment |
| Mesopotamia | first civilization located between the Tigris & Eurphrates Rivers in present day Iraq |