Alex Science Crossword

3. Vibrations that are caused by earthquakes.
6. A long chain of undersea mountains.
7. Theory if how the plates move.
10. Transfer of heat through motion of liquids and gases.
11. Idea that continents move around on Earth's surface.
14. A lithospheric plate boundary where two plates slide by each other.
15. Scientists who detect seismic waves.
16. Process involving a lithospheric plate sinking into the mantle.
17. A movement that begins in one location and sets things in motion far away.
19. Center of the Earth.
20. Mass of an object divided by its volume.

1. Huge landmass composed of earlier forms of todays continents.
2. Valley in the ocean created when one lithospheric plate subducts under another.
4. Waves that move with a forward and backwards morion.
5. Thick lithospheric plates that form the continents.
8. A lithospheric plate boundary where two plates come together.
9. Outermost layer of Earth.
12. A lithospheric plate boundary where two plates move apart.
13. Plates that form ocean floor.
15. Seismic waves that move side to side.
18. Thick layer of Earth between crust and core.