| A | B |
| Landform | physical characteristics which make up the earth |
| magma | melted rock within the earth's mantle |
| condensation | process in which water vapor changes into a liquid form |
| tropics | region of the world located between the Tropics of Cancer and Capricorn with a generally hot climate |
| permafrost | permanenetly forzen lower layers of soil in Arctic regions |
| core | central layer of the earth composed of hot melted metal |
| plate tectonics | theory in geology that the earth's curst is made up of huge, moving plates of rock |
| evaporation | process in which water from oceans, lakes and streams is truned into a gas or vapor by the sun's heat |
| hurricane | fierce tropical storm system with high sped winds, formed over warm oceans |
| mantle | middle layer of the earth, composed of thick hot rock |
| fault | crack in the rocks of the earth's crust along which movement occurs |
| precipitation | water that falls to the earth as rain, snow, or sleet |
| tsumami | huge sea wave caused by an earthquake on the ocean floor |
| crust | outer layer of the earth |
| vapor | water in the form of gas |
| aquifer | underground rock layer that stores large amounts of water |
| monsoon | seasonal winds that bring rain to parts of Asia |