Across
- 1. When magma is above ground it is called _____.
- 4. One plate moves under another plate.
- 8. A ______ volcano is one that has not erupted recently, but may still erupt again.
- 9. Thinnest layer of the Earth.
- 12. ________ currents in the mantle cause plates to move.
- 14. Plates moving apart from one another.
- 16. Plates moving towards one another.
- 17. The place under the Earth where an Earthquake happens.
Down
- 2. Most of these are found on the Ring of Fire.
- 3. Plates sliding past one another.
- 5. Earthquakes release_________ waves.
- 6. Heat travels in solids by ______________.
- 7. The Earth's crust is made up of _______ plates.
- 10. A series of large waves usually caused by an Earthquake.
- 11. Thickest layer of the Earth.
- 13. Heat travels in outer space by ___________.
- 15. The moment-magnitude scale is a _______ scale to measure Earthquakes.