Across
- 5. a partly molten layer in Earth's upper mantle just below the lithosphereasthenosphere
- 6. a record of ground motionseismogram
- 8. an opening in Earth's surface that,when active ,spews out gases,chunks of rock,and melted rock volcano
- 9. the study of the magnetic properties of ancient rockspaleomagnetism
- 10. Earth's outermost layer formed by lighter materialscrust
- 11. lithospherethe later of Earth made up of the crust and uppermost mantle and ranging in thickness from 65km to 100km
- 14. the action of one tectonic plate pushing underneath another
Down
- 1. Earth's thickest layer,lying just below the crust and making up 70 percent of Earth's volumemantle
- 2. the measure of how much area of an object is exposed;can affect reaction ratesurface waves
- 3. the extent of ancient glaciers;also the rock markings they left behindpaleoglaciation
- 4. molten rock beneath Earth's surfacemagma
- 7. Earth's solid centreinner core
- 12. a study of earthquakes and seismic waves
- 13. in geology,the location inside Earth where an earthquake starts focus
- 15. a deep underwater valley that is formed when an oceanic plate collides with a continental plate and is forced to slide beneath it