| A | B |
|---|
| Geographic Information System | A computer software program that helps geographers gather many kinds of information about a place. |
| equinox | It is the day in March and September when the sun appears over the Equator; when day and night are of equal length. |
| erosion | It is the moving or wearing away of weathered material by wind, water, and ice. |
| delta | It is an area where soil and sand are deposited at a river's mouth and built up over time. |
| geography | It is the study of the earth and its land, water, and plant and animal life. |
| solar system | This is a group of planets and other bodies that revolve around the sun. |
| core | It is the center of the earth that is solid metal surrounded by hot, liquid metal. |
| elevation | It is the height above sea level. |
| Global Positioning System | It is a group of satellites traveling around the earth that tells the exact location of places. |
| winter solstice | It is the day in December when the sun appears directly over the Tropic of Capricorn; it is the day with the fewest hours of sunlight. |
| weathering | It is the breaking down of surface rocks into smaller pieces by water, frost, chemicals, and plants. |
| strait | It is a narrow body of water between two pieces of land. |
| region | It is an area, or place, that shares common characteristics. |
| revolution | It is one complete orbit of a planet around the sun. |
| fault | It is a crack in the earth's crust. |
| trench | It is a deep valley on the ocean floor. |
| landforms | They are individual features of the land, like mountains and rivers. |
| atmosphere | It is the layer of air surrounding the earth. |
| mantle | It is a layer of solid and melted rock surrounding earth's core. |
| continental shelf | It is an underwater plateau that lies off each coast of a continent. |
| isthmus | It is a narrow piece of land that connects two larger pieces of land. |
| plate tectonics | It is a theory that the earth's crust is made up of huge, moving plates of rock. |
| orbit | It is the path planets follow in revolving around the sun. |
| environment | It is our natural surroundings. |
| physical and human | These are the two characteristics geographers study about a place. |
| tilt of the earth and its travel around the sun | These two factors cause changes in the seasons. |
| continents | These are massive land areas on earth. |
| crust | This is the relatively thin, uppermost layer of the earth. |
| tsunamis | These are huge waves caused by undersea earthquakes. |
| earthquake | this is a violent and sudden movement of the earth's crust. |
| angle of the sun's rays | This is one cause for the change in seasons |
| twenty-three and one half | The earth is tilted on its axis this number of degrees. |
| summer solstice | The sun is directly over the Tropic of Cancer on June 21st. The |
| It contains things people need to live such as freshwater, reasonable temperatures, enough rain, available food, and available supplies. | Name two kinds of things that make an area a good place to live. |
