Across
- 2. the supercontinent that was discovered by Alfred Wegener
- 4. a mountain where lava can erupt or explode out of
- 5. heat transfers like this when there is direct contact of two objects
- 6. a certain flow which transfers heat
- 7. a measure of mass in a given volume of a substance
- 8. a device powered by sound waves which measures the distance to an object
- 11. an idea introduced by Alfred Wegener that suggests the continents slowly moved over Earths surface
- 17. sections of Earths crust that are constantly in motion in motion
- 18. a process where mid-ocean ridges continually add new material to the ocean floor
- 19. a process where old ocean floor is sucked into the mantle
Down
- 1. long passageways to the inside of the Earth where old seafloor is sucked in and turned into new seafloor
- 3. cracks in Earths crust where there has been moving plates
- 5. heat transfers like this when in the form of a liquid
- 6. a tectonic boundary where plates are moving into each other
- 9. a deep valley of Earths crust that has diverged onto land
- 10. a mixture of rock-forming substances, gases, and water from the mantle that is underground
- 12. a tectonic boundary where plates are moving away from each other
- 13. heat transfers like this when there is energy coming directly from a source like the sun or fire
- 14. a long underwater chain of mountains
- 15. a piece of an ancient organism that was preserved in rock
- 16. a tectonic boundary where plates are sliding past each other