Chapter 1: Plate Tectonics
Across
- 4. layer of rock that forms Earth's outer skin
- 6. heat transfer by direct contact
- 13. idea that all the continents slowly moved over Earth's surface
- 14. shape the surface by building up mountains and landmasses
- 15. seven great landmasses surrounded by oceans
- 17. the lithosphere is broken apart into separate sections
- 19. scientists who study the forces that make and shape the planet
- 22. measure of how much mass there is per volume of a substance
- 23. the part of the mantle that is soft and can bend-like plastic
- 26. dark, dense rock with a fine texture
- 27. slowly wear away mountains and eventually every other feature on the surface
- 29. most extensive chain of maintains
- 30. supercontinent, meaning "all lands"
- 31. subduction allows parts of the ocean floor to sink back into the mantle, over tens of millions of years
- 32. a place where two plates slide past each other, moving in opposite directions
Down
- 1. process that adds new material to the ocean floor
- 2. a dense ball of solid metal created with extreme pressure
- 3. layer of molten metal that surrounds the inner core
- 5. transfer of energy through empty space in waves
- 7. constant flow of heats within a liquid
- 8. hypothesis that all continents were once joined together in a single landmass
- 9. in Greek means "weak"
- 10. uppermost part of the mantle and crust together form a rigid layer
- 11. a place where two plates move apart, or away from each other
- 12. device that bounces sound waves off underwater objects
- 13. heat transfer through gases of liquids
- 16. a rock with larger crystals than basalt and is not as dense
- 18. any trace of an ancient organism preserved in rock
- 20. movement of energy from a warmer object to a cooler object
- 21. layer of solid material and layers of hot rock
- 24. breaks in Earth's crust where rocks have slipped past each other
- 25. forms along divergent boundaries and is a deep valley
- 28. where two plates come together