| A | B |
|---|
| crust | The layer of earth that lies above the mantle |
| mantle | The layer of the earth between the core and the crust |
| core | The dense, metallic, innermost layer of the Earth |
| lithosphere | The cool, solid part of the Earth that includes the crust and the upper part of the mantle |
| asthenosphere | The semiliquid layer of the Earth between the lithosphere and the mesosphere |
| convection | The circular flow of matter in the mantle |
| seismic wave | The wave produced by earthquakes |
| Moho | The boundary between the crust and the mantle |
| shadow zone | The area of Earth where seismic waves cannot be detected by a seismograph |
