Geography

2. crack in the Earth's crust.
3. spreading- the formation of fresh areas of oceanic crust which occurs through the upwelling of magma at mid-ocean ridges and its subsequent outward movement on either side.
4. a major area in the basin of the Pacific Ocean where a large number of earthquakes and volcanic eruptions occur.
6. a mountain or hill, typically conical, having a crater or vent through which lava, rock fragments, hot vapour, and gas are or have been erupted from the earth's crust.
9. hot fluid or semi-fluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling.
10. the second to last layer of the Earth. It is a magma like liquid layer that surrounds the Inner Core and creates Earth's magnetic field.
11. the gradual movement of the continents across the earth's surface through geological time.
12. a linear feature that exists between two tectonic plates that are moving away from each other.
17. an eruption of molten material from a fissure, vent, or active lava lakes.
18. places where plates slide sideways past each other.
20. hot molten or semi-fluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this.
23. a layer between the crust and the outer core.
24. a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle.

1. a sudden violent shaking of the ground, typically causing great destruction, as a result of movements within the earth's crust or volcanic action.
3. an elastic wave in the earth produced by an earthquake or other means.
5. a small area with a relatively high temperature in comparison to its surroundings.
7. the rigid outer part of the earth, consisting of the crust and upper mantle.
8. a region of active deformation where two or more tectonic plates or fragments of the lithosphere near the end of their life cycle.
13. a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere
14. a region of the Earth's crust where tectonic plates meet. Tectonic plates are massive pieces of the Earth's crust that interact with each other.
15. a tectonic plate which includes most of the continent of Eurasia
16. The breaking up and formation of supercontinents
19. the outermost layer of a planet.
21. a depression of the earth's surface in which an ocean lies.
22. the Earth's innermost part.