Across
- 2. A transfer of heat is occurring in Earth's mantle
- 9. Earth’s magnetic field results from movement of the material in the
- 10. The theory of seafloor spreading says that new ocean crust is formed at ocean ridges and destroyed at
- 12. Which two land forms are caused by convergent plate boundaries?
- 13. the name of an ancient fossil found on different continents
- 14. How are scientists able to study Earth’s interior?
- 15. Lavapillows and magnetic striping patterns provide evidence for
- 16. The old oceanic crust is denser than new oceanic crust because it is
- 17. A place where two plates slip past each other, moving in opposite directions, is known as a
- 20. On the ocean floor, rocks are the youngest near a
Down
- 1. Most geologists think that the movement of Earth’s plates is caused by
- 3. Subduction zones are found at which of the plate boundaries
- 4. The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as
- 5. Which type of evidence was NOT used by Alfred Wegener to support his continental drift hypothesis?
- 6. The place where two tectonic plates move away from each other is called a
- 7. the name of the German scientist that discovered the theory of continental drift
- 8. Tectonic plate movements are generally measured in _?_ per year
- 11. A place where two tectonic plates move toward each other is called a
- 18. In sea-floor spreading, molten material rises from the mantle and erupts
- 19. the name of the supercontinent that existed millions of years ago