| Answer | Crossword Clue |
|---|---|
| SOIL | Layer of earth. |
| SOIL | Layer of earth |
| MANTLE | Layer of Earth |
| MANTLE | Layer of the earth |
| TOPSOIL | Upper layer of fertile earth |
| CRUST | Outer layer of the Earth |
| OZONE | Kind of layer protecting the earth |
| MANTLE | Layer of the earth between the crust and the core |
| CRUST | Earth layer |
| MOHO | Earth layer |
| MANTLE | Earth layer |
| SOD | Earth layer |
| UNSOIL | Remove top earth layer. |
| SUBSOIL | Near-the-surface earth layer |
| IONOSPHERE | Layer around Earth affecting radio waves |
