Across
- 2. forms in the crust and upper mantle when solid rock partially melts
- 3. formation of magma depends on water content, heat, and what?
- 6. volcanic activity that occurs within a plate
- 8. plates pull apart at this boundary
- 9. magma contains three things: dissolved gases, water, and what?
- 10. the long belt of volcanoes that circles the Pacific Ocean
Down
- 1. melting process that takes place as hot yet solid mantle rock rises because it is less dense than the surrounding rock
- 4. small volcanic region a few hundred kilometers across
- 5. this lowers the rock's melting temperature
- 7. this is where divergent boundaries are found