Geology layers

3. A crack or fissure in the Earth’s surface where tectonic plates are moving apart.
9. A crack in the Earth’s crust where two tectonic plates meet and move relative to each other.
11. Rock formed by the accumulation and compression of sediment over time.
12. The shaking of the ground caused by the sudden movement of tectonic plates.
14. A semi-fluid layer beneath the lithosphere that allows tectonic plates to move.
15. An opening in the Earth’s surface where molten rock, ash, and gasses erupt.
17. The solid innermost layer of the Earth, composed primarily of iron and nickel.
18. Rock formed from cooled and solidified magma or lava.
19. The thicker, less dense part of the Earth’s crust that forms the continents.
20. The outermost layer of the Earth, composed of solid rock.
21. A region where one tectonic plate moves beneath another into the mantle.

1. The rigid outer layer of the Earth, comprising the crust and the upper part of the mantle.
2. Vibrations that travel through the Earth, typically caused by earthquakes.
4. Large sections of the Earth’s lithosphere that move and interact at their boundaries.
5. The thinner, denser part of the Earth’s crust that underlies the oceans.
6. The liquid layer of the Earth between the mantle and inner core, composed of molten iron and nickel.
7. The layer beneath the crust, composed of silicate rocks rich in iron and magnesium.
8. Molten rock located beneath the Earth’s surface.
10. Rock that has been changed by heat and pressure from its original form.
13. Molten rock that reaches the Earth’s surface through volcanic activity.
16. Circular movements of molten material in the mantle, driving plate tectonics.