| A | B |
|---|
| continent | landmass above water on the earth |
| solor system | consists of the sun and nine known planets, as well as other celestial bodies that orbit the sun |
| core | the earths center, made up of iron and nickel; the inner core is solid, and the outer core is liquid |
| mantle | a rock layer about 1,800 miles thick tht is between the earth's crust and the earths core |
| magma | the molten rock material formed when solid rock in the earth's mantle or crust melts |
| crust | the thin rock layer making up the earth's surface |
| atmosphere | the layers of gases immediately surrounding the earth |
| lithosphere | the solid rock portion of the earths surface |
| hydroshpere | the water comprising the earth's surface including oceans, seas, rivers, lakes, and vapor in teh atmosphere |
| continetal drift | the hypothesis that all continents were once joined into a supercontinent that split apart over millions of years |
| hydrologic cycle | the continuous circulation of water among the atmosphere, the oceans, and the earth |
| drainage basin | an area drained by a major river and its tributaaries |
| ground water | the water held under the earth's surface often in and around the pores of rock |
| water table | the level at which rock is saturated |
| landform | a naturally formed feature on the surface of the earth |
| continental shelf | the earth's surface form the edge of a continent to the deep part of the ocean |
| relief | the difference in elevation of a land form from the lowest point to the higest point |
| topography | the combuned characteristics of landforms and their distribution in a region |
