Across
- 2. the boundary between the crust and the mantle in the earth
- 4. situated inside the earth at a depth of about 2900 kilometres below the surface
- 5. the rigid outer part of the earth
- 7. an elastic wave in the earth produced by an earthquake or other means
Down
- 1. the rigid outer part of the earth
- 3. a layer of silicate rock between the crust and the outer core
- 6. wave that travel along the surface of solids