Plate Tectonics CW 3
Across
- 3. A solid form of carbon dioxide that is very cold and turns directly from a solid to a gas.
- 5. To reuse something that would have otherwise been thrown out or to turn it into something usable again instead of sending it to a landfill.
- 7. A boundary of two tectonic plates where the plates move towards each other.
- 10. A scientist who studies earthquakes.
- 13. a cycle of heating, rising, cooling and sinking
- 14. a deep valley where pieces of Earth’s crust diverge on land
- 15. When two tectonic plates slowly crash into each other and mountains are formed.
- 18. the layer below the lithosphere and is plasticlike
- 19. Wegener’s hypothesis that all continents were once connected in a large landmass that broke apart & drifted slowly to their current positions
- 21. this layer is formed with the crust and rigid upper mantle, and is above the asthenosphere
- 23. a theory that proposes that magma under Earth’s crust is forced up toward the surface at the mid-ocean ridges, forming new seafloor
- 25. Slowly moving pieces of Earth’s crust.
- 26. scientist that discovered sea-floor spreading
- 27. melted rock
- 28. All the rock, soil and sediments that makeup Earth’s land. It comes from the word “Geo” which means “Earth.”
- 31. All the gases surrounding the earth. It comes from the word “Atmos” which means “air.”
- 33. large sections of Earth’s crust and upper mantle
- 34. scientist that developed the idea of continental drift
- 35. deep underwater canyons
- 36. large, slow moving bodies of ice on land
- 37. When one tectonic plate converges under another due to density differences.
Down
- 1. All the oceans, rivers, lakes and water on Earth. It comes from the word “Hydro” which means “water.”
- 2. a chain of ridges and valleys stretching along Earth’s ocean floor
- 4. pull-apart forces
- 6. Movement caused by warm fluids rising and cooler fluids sinking.
- 8. forces that destroy and wear away landmasses through process like erosion and weathering
- 9. the process of moving things from one place to another.
- 11. A boundary of two tectonic plates where the plates slide past each other.
- 12. these are constantly being created and destroyed by competing forces
- 16. a single landmass composed of all the continents joined together
- 17. All the living things on Earth. It comes from the word “Bio” which means “life.”
- 20. a measure of how much mass there is in a given volume of a substance
- 22. forces that shape the land’s surface by building up mountains & other landmasses.
- 24. breaks in Earth’s crust where rocks have slipped past each other
- 29. any trace of an ancient organism that has been preserved in rock
- 30. The outer most layer of the Earth. This is the layer we walk on.
- 32. A boundary of two tectonic plates where the plates move away from each other.