Across
- 4. are formed when lava flows underwater
- 5. a sudden volent shaking of the ground
- 7. the most common volcano
- 10. erupt regularly, but not enough to be classified as active
- 12. how fast a point on the ground is shaking
- 13. the number of times something happens in a certain amount of time
- 17. the gradual movement of the continents across the earths surface
- 20. a tube formed by cooling of lava walls while fluid lava contiues to flow
- 22. induced by the movement of magma
- 25. outer layer of the earth
- 27. the size of an earhtquake
- 28. Moltern Rock outside of the earths surface
- 30. found mainly under the ocean
- 32. the place where two convergent plates come togther
- 33. a mountain or hill that has a vent through which lava and rock fragments can erupt from.
- 34. sleeping volcano, can erupt but hasnt in a very long time
- 38. the point on the earths surface vertically above the focus of an earthquake
- 40. lava with a ropelike surface texture, low viscosity
- 41. made up of iron and nickel
Down
- 1. Magma rock underneath the earths surface
- 2. moving apart
- 3. theory of the continental drift by ________
- 6. Make up the larger land masses we live on
- 8. solids and gases in the air after a volcano erupts
- 9. made up of magma, very thick
- 11. a way to express the magnitued of an earthquake
- 14. earthquake poduced by the detonation of chemicals or nuclear devices
- 15. the main vent in a volcano
- 16. can erupt at any time
- 18. the world is made up of these
- 19. earthquake is small, happen underground and in mines.
- 21. the rock that comes out of a vocano
- 23. volcano built from layers of cooled lava
- 24. sliding
- 26. Block lava, has high viscosity
- 29. volcano has no magma chamber
- 31. pushing together
- 35. least explosive volcano
- 36. a zone of volcanoes surrounding the pacific ocean
- 37. center of the earth
- 39. the largest earthquake in a sequence