| A | B |
|---|
| Radiation | The transfer of energy through space. |
| Convection | The transfer of heat by movement of a fluid. |
| Convection Current | The movement of a fluid caused by differences in temperature, that transfers heat from one part of the fluid to another. |
| Conduction | The transfer of heat within a material or between materials that are touching. |
| magma | The molten mixture of rock found in the mantle. |
| mid-ocean ridge | An undersea mountain chain shere new ocean floor is produced at a divergent plate boundary. |
| sea-floor spreading | The process by wich molten material adds new oceanic crust to the ocean floor. |
| subduction | The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent boundary. |
| deep-ocean trench | A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle. |
| density | The amount of mass in a given space. |
