Across
- 5. the transfer of heat through electromagnetic waves.
- 8. hot air rises, cool air sinks.
- 10. the upper layer of the earth's mantle, below the lithosphere, in which there is relatively low resistance to plastic flow and convection is thought to occur.
- 11. the second most abundant element found in the inner and outer cores of Earth.
- 14. the theory that changes in the earth's crust during geological history have resulted from the action of continuous and uniform processes.
- 16. theory that the Earth's lithosphere (the crust and upper mantle) is divided into a number of large, platelike sections
- 19. a split or break that forms when the earth's crust divides.
- 20. at this type of boundary, plates are moving toward each other, eventually colliding
- 21. a chain of underwater mountains formed by seafloor spreading at divergent plate boundaries. Similar to the stitching on a baseball.
Down
- 1. the transfer of heat or matter by the flow of a fluid, especially horizontally in the atmosphere or the sea.
- 2. the layer of Earth composed of solid iron and nickel.
- 3. at this type of boundary, plates are moving away from each other, creating rift valleys or mid-ocean ridges
- 4. boundary between two tectonic plates, where the plates are moving horizontally or vertically in opposite directions, not against or away from each other
- 6. the outermost layer of Earth, where we live, work and play.
- 7. the rocky outer part of Earth. It is made up of the brittle crust and the top part of the upper mantle. It lies below the crust.
- 9. at this type of boundary, plates are sliding past each other in opposite directions, often leading to earthquakes
- 12. the theory that our continents are slowly drifting across the surface of Earth
- 13. the layer of Earth in which convection takes place.
- 15. when heat moves from one object to another object through direct touch.
- 17. the layer of Earth composed of liquid iron and nickel
- 18. the heaviest of metal elements found in the inner and outer cores of Earth.