Across
- 1. Primary waves from an earthquake that can travel through solids and liquids
- 9. The time it takes for half of the radioactive element in a substance to decay into the decay product
- 11. _______ Dating: A form of absolute dating that measures the decay-product ratio of a radioactive element
- 12. Mid-Ocean _____: Undersea ranges that form at divergent boundaries where new oceanic crust is forming
- 13. the movement of heated fluids due to density differences
- 16. ______ Boundary: A tectonic zone where two plates are moving toward each other
- 19. A break in the Earth’s crust showing tectonic movement
- 21. Secondary waves from an earthquake that cannot travel through liquids
- 22. Rocks that are changed by intense heat and pressure, changing the mineral composition
Down
- 2. The process by which particles gather by gravity to form larger bodies like stars, planets, and moons.
- 3. Tectonic zone where a plate is sinking below another
- 4. ______ Boundary: A tectonic zone where new crust is being created by rising magma and pushes existing crust away
- 5. An ancient supercontinent that broke apart millions of years ago to form the present continents
- 6. Natural, solid inorganic substances that make up rocks
- 7. Plate ________: Theory of crustal motion that describes how the crust is divided into a dozen plates that carry the continents
- 8. Rocks that are compacted and cemented from weathered sediments
- 10. _____ Spot: A location where a plume of magma consistently rises causing volcanism
- 14. Rocks that form from the cooling a crystallization of magma or lava
- 15. Natural vibrations that radiate from a sudden tectonic movement or magma under a volcano
- 17. _______ boundary: Tectonic zone where plates are moving past each other
- 18. Late Heavy ______: A period 4 billion years ago when the early solar system had a high rate of asteroid, comet, and meteoroid impacts
- 20. The location on the crust above where an earthquake occurred underground