Dynamic Planet Unit Test Review
Across
- 4. The point on the surface above the source of an earthquake is called the:
- 6. Heat convection in the mantle is responsible for breaking the ___ up into plates.
- 7. The Hawaiian Islands are ___ volcanoes.
- 11. The Hawaiian Islands are a chain of volcanic islands that have formed as the Pacific Ocean plate has moved over a mantle plume. What type of volcano are they? They are ___ volcanoes.
- 12. The Earth's ___ heat is the source of the energy that drives plate tectonics.
- 14. Earth's ___ crust is the most density.
- 16. In addition to forming ore deposits, the ancient failed rift also caused undersea volcanic eruptions. Evidence for this can be found along highways near Marquette in the basalt ___ lavas that formed as lava erupted into the ancient seas.
- 17. What type of volcano tends to have explosive eruptions due to having lots of dissolved gasses in the magma?
- 18. Our planet's magnetic field is generated by Earth's:
- 21. Plates come together at ___ boundaries.
- 22. Island arcs – like Alaska’s Aleutian Islands – form at what type of plate boundary?
- 24. New oceanic crust forms at divergent plate boundaries. The crust moves ___ the ridge that runs along the center of the divergent boundary.
- 27. Alaska's Aleutian Islands are what type of volcano?
- 28. An earthquake’s magnitude is a measure of the size of seismic waves it produces.
- 30. This type of seismic wave cannot pass through liquids, like our planet's liquid outer core.
- 32. The first ___ waves to arrive at a seismograph station, like ours at CHMI, are called P waves.
- 33. The ___ magnitude scale is the scale used today to indicate the size of an earthquakes waves,
- 34. Africa is splitting apart along the Great Rift Valley. What type of plate boundary is found here?
Down
- 1. The oldest ocean crust is found farthest from mid-ocean ___.
- 2. Elastic ___ causes earthquakes.
- 3. The lithosphere is Earth's outermost solid layer. It includes the crust and the upper ___
- 5. A volcano that is fairly symmetrical and has both layers of lava and pyroclastic deposits is a ___ cone volcano.
- 7. The study of the behavior of earthquake waves is called:
- 8. The Hawaiian Islands were formed when the Pacific Plate moved over a ____.
- 9. The point underground where stored energy in a fault is first released - causing an earthquake.
- 10. S waves travel ___ than P waves.
- 11. Our planet's magnetic field protects us from dangerous ___ radiation.
- 13. ___ reversals provide strong evidence for seafloor spreading
- 15. Earthquakes are usually associated with ____.
- 19. High silica content and dissolved gases contribute to the ___ eruptions of stratovolcanoes.
- 20. Most earthquakes occur along plate ___.
- 23. The crust and uppermost mantle make up the rigid outer layer of Earth called the ____.
- 25. A chain of hot spot volcanoes forms when oceanic crust moves over a mantle ___.
- 26. The theory of plate___ helps scientists explain how earthquakes and volcanoes occur.
- 27. Both the crust and mantle are made up mostly of ___ minerals.
- 29. What metal ore deposits in our Upper Peninsula formed on the bottom of an ancient sea when North America almost split apart along a divergent plate boundary?
- 31. Earth's inner core is ___