Chapter 7 crossword puzzle

3. - When two plates slide past each other
5. currents - The cycle of heating, rising, cooling, and sinking
7. - is the outermost solid shell of a rocky planet,
9. Boundary - When two plates move together
11. boundaries- the edges where two plates meet.
14. Boundary - When two plates move apart.
16. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's
17. spreading - the formation of new areas of oceanic crust, which occurs through the upwelling of magma at mid ocean ridges and its subsequent outward movement on either side.
18. Core- the innermost geologic layer of the planet Earth.
19. ocean ridge- a seafloor mountain system formed by plate tectonics.

1. - the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
2. - the region of the earth's interior between the crust and the core, believed to consist of hot, dense silicate rocks
4. drift - the gradual movement of the continents across the earth's surface through geological time.
6. - A large landmass
8. field - a region around a magnetic material or a moving electric charge within which the force of magnetism acts.
10. - the rigid outer part of the earth, consisting of the crust and upper mantle.
11. tectonics - 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.
12. Crust - is the outermost solid shell of a rocky planet
13. a planar fracture in rock across which there has been displacement as a result of movement.
15. single supercontinent that once existed?