Across
- 5. Single large landmass made up of all the continents connected together that broke apart 200 million years ago.
- 7. A tracing of earthquake motion that is created by a seismograph.
- 8. A weak spot in the middle of a tectonic plate where magma surfaces; forms a volcano.
- 9. Very dense, solid center of the Earth that is made of mostly iron with smaller amounts of oxygen, silicon, sulfur, or nickel.
- 11. Cycle of heating, rising, cooling, and sinking that is thought to be the force behind plate tectonics.
- 12. Measure of the energy released by an earthquake.
- 13. An earthquake that occurs after a larger earthquake in the same area.
- 16. Energy waves that are produced at and travel outward fro the earthquakes focus.
- 18. Largest layer inside Earth, lying directly above the outer core and that is made mostly of silicon, oxygen, magnesium, and iron.
- 19. An opening on Earth's surface where magma is forced up and flows out as lava.
Down
- 1. A long high sea wave caused by an earthquake or other disturbance.
- 2. Point in Earth's surface directly above an earthquake's focus.
- 3. Point at the depth where the rocks ruptured to produce earthquakes; places were quake waves originate.
- 4. Bits of rock or solified lava dropped from the air.
- 6. hypothesis proposed by Alfred Wegener that the states that continents have moved slowly to their current locations on Earth.
- 10. Plastic-like layer below the lithosphere.
- 11. Earths outermost layer.
- 14. A layer of molten iron and nickel that surrounds the inner core of Earth.
- 15. Remains or traces of a once living organism reserved by rock.
- 17. Surface along which rocks break and move.