Please help me on my science homework! EASY!!!?

10. How are volcanoes formed at divergent plate boundaries?


11. How are volcanic arcs formed?


12. How are island arcs formed?





Choose basaltic or granite


1. ___ contains a low percentage of silica


2. ___ has high viscosity


3. ___ contains a high percentage of silica


4. ___ has low viscosity


5. ___ flows quietly without explosive eruptions


6. ___ traps gases and produces explosive eruptions





batholith, dike, dome, sill


10. Magma cools slowly and solidifies before reaching the surface. _____


11. Magma is forced into a crack that cuts across rock layers. ____


12. Magma is forced into a crack parallel to rock layers. ____


14. A mass of think, highly viscous lava piles up instead of flowing freely. ____|||I don't know how old you are, and I don't mean to sound demeaning, but this web site looks like it has all the answers you might need.





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Now get busy!!!!|||Volcanoes are formed when two plates that have been pushing together start pushing upwards because of the pressure everything form under the earths crust such as molten rock or lava use this t escape as they do they build up the area around the volcano.|||Assignment help , homework help , Project help , online homework, chemistry help,


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