Across
- 4. Cracks in the earth’s crust along which there is movement.
- 7. Currents- Drive the movement of Earth’s rigid tectonic plates in the planet’s fluid molten mantle.
- 8. tectonics The theory that Earth’s outer shell is divided into large slabs of solid rock called plates that glide over the mantle.
- 9. Places where plates slide sideways past each other.
Down
- 1. A boundary that is a linear feature that exists between two tectonic plates moving away from each other.
- 2. An area on Earth where two or more plates collide. Eventually one slides beneath the other in a process known as subduction.
- 3. 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.
- 5. The rigid outer part of the earth, consisting of the crust and upper mantle.
- 6. long narrow depressions on the sea floor that form at the boundary of tectonic plates where one plate is pushed beneath another.