Across
- 4. , belief that changes in the earth happen a little at a time
- 5. , study of processes that affect the earth's crust
- 6. , innermost layer of earth
- 9. , boundary where two plates are pushed together
- 10. , outermost layer of Earth
- 11. , part of the mantle the plates move on top of
- 12. , boundary where two plates are pushed apart
Down
- 1. , when one plate goes underneath another
- 2. , belief that changes to the earth are sudden
- 3. , middle layer of Earth
- 7. , when melted rock comes up through the surface of the earth
- 8. , boundary where two plates move past each other