Across
- 4. What is the newest ocean
- 5. Area where magma is rising from the mantle
- 10. least dense layer of Earth
- 11. what is the smallest ocean
- 14. Dense Crust made of Basalt
- 15. How many major plates are there
- 18. The study of ocean depths
- 19. Thickest layer of the Earth
- 21. Small Land Area surrounded by water
Down
- 1. Line that divides East and West hemispheres
- 2. Boundary where two plates are moving past each other
- 3. Boundary where two plates are moving toward each other
- 6. when oceanic crust goes under continental crust
- 7. Tool used to measure longitude at sea
- 8. Outermost layer of the Earth
- 9. Long horizontal parallel lines around the earth
- 12. Most Dense layer of the Earth
- 13. Boundary where two plates are moving apart
- 16. Line that divides north and south hemispheres
- 17. Long Narrow Deep Depression in oceanic crust
- 20. Meridians going from pole to pole
- 22. Sound Navigation and Ranging