Across
- 3. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
- 6. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action
- 9. boundary A strike-slip fault, common in mid-ocean ridge regions, in which there has been a sudden change in the form or direction of displacement
- 10. mountains mountain ranges that are formed when two of the tectonic plates that make up the Earth's crust push together at their border. The extreme pressure forces the edges of the plates upwards into a series of folds
- 11. oceanic ridge is an underwater mountain system that consists of various mountain ranges (chains), typically having a valley known as a rift running along its spine, formed by plate tectonics.
- 12. a long; narrow ditch
- 15. boundary is a linear feature that exists between two tectonic plates that are moving away from each other
Down
- 1. (of a rock formation) be broken by a fault or faults
- 2. boundary where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide
- 4. range a line of mountains connected by high ground
- 5. slip fault a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault
- 7. spot a small area or region with a relatively hot temperature in comparison to its surroundings
- 8. current a current in a fluid that results from convection
- 13. pressure or tension exerted on a material object
- 14. boundary A tectonic boundary where two plates are moving away from each other and new crust is forming from magma that rises to the Earth's surface between the two plates.