Across
- 4. currents / Formed when magma rises and flows under the plates.
- 5. / There are 7 of these of plates.
- 7. / The upper mantle.
- 9. / What pulls the crust away from he ridge as it cools.
- 10. / The hot semi-solid rock in the asthenosphere.
Down
- 1. Eruption / An effect of continental drift.
- 2. Drift / The name for the process of continents changing their configuration.
- 3. / The heat produced from this process in the earth's core is the driving force for continental drift.
- 6. / The centre of the earth contains this and heavy atoms.
- 8. plates / Plates larger than continents that float on the asthenosphere.