Tectonic Plates

5. The solid, outer layer of Earth that consists of the crust and the rigid upper part of the mantle
7. Openings in Earth's crust from which molten rock, lava, ash, and gasses flow or erupt out of
9. Circular currents in the mantle caused by the magma being heated by the core of the Earth
10. Break in a body of rock along which one block slides relative to another
11. Thin and solid outermost layer of Earth above the mantle
12. The hypothesis that says the continents once were a single landmass, broke apart, and drifted to the present day locations
14. The boundary between two tectonic plates that move away from each other
16. The man that proposed continental drift in the 1900s
18. Part of the mantle containing convection currents that is below the lithosphere
20. Layer of molten rock between Earth's crust and core

1. Blocks of lithosphere that consist of the crust and the rigid, outermost part of the mantle
2. The two cores spin at different speeds, this might be the reason for Earth's magnetic field and magnetic stripping
3. Located below the mantle and believed to be composed of liquid iron and nickel
4. The boundary between tectonic plates that slide past each other horizontally
6. Process by which new oceanic lithosphere forms when magma rises toward the surface and solidifies
8. A theory that explains how tectonic plates change in shape and move around
9. All the continents were once a single landmass called Pangaea and drifted apart, present continents share fosils and animals
11. Boundary formed by the collision of two plates of lithosphere
13. The center of Earth; believed to be made of iron and nickel
15. Layer of Earth directly below the crust that is made of elements in plastic
17. A sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movement in Earth's crust or volcanic action
19. A hypothetical large landmass that contains all the present continents that was formed during the Triassic period