| A | B |
|---|
| landform | natural features of the earth's land surface |
| core | central layer of the earth, probably composed of hot iron and nickel, solid in the inner core and molten in the outer |
| mantle | middle layer of the earth, composed of thick hot rock |
| crust | outer layer of the earth |
| magma | melted rock within the earth's mantle |
| continent | one of the major land areas of the earth |
| plate tectonics | theory in geology that the earth's crust is made up of huge, moving plates of rock |
| fault | crack in the rocks of the earth's crust along which movement occurs |
| earthquake | violent jolting or shaking of the earth caused by movement of rocks along a fault |
| tsunami | huge sea wave caused by an earthquake on the ocean floor |
| weathering | process by which surface rocks are broken down into smaller pieces by water, chemicals, or frost |
| erosion | wearing away of the earth's surface, mainly by water, wind, or ice |
| plateau | flat landform whose surface is raised above the surrounding land, with a steep cliff on one side |
| isthmus | narrow piece of land connecting two larger pieces of land |
| peninsula | piece of land surrounded by water on three sides |
