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Homework answers / question archive / 1 How is magma generated along convergent plate boundaries? Friction from the subducting plate raises the temperature of the rock under which it subducts, melting this rock into magma
1 How is magma generated along convergent plate boundaries?
| Friction from the subducting plate raises the temperature of the rock under which it subducts, melting this rock into magma. |
| The subducting plate pushes mantle rock upwards, where it reaches the surface through the trench. |
| The subducting plate drives water and carbon dioxide into the mantle, which reduces the temperature at which it melts, allowing mantle rock to melt and rise. |
| The collision of two continental plates create enough heat to melt rock, thus producing magma. |
| The subducting plate pushes mantle rock upwards, which decompresses as it rises. This decompression allows the mantle rock to melt. |
2.
Volcanism at divergent plate boundaries is most often associated with which rock type, and what causes rocks to melt in these settings?
| Volcanism at divergent boundaries is most often associated with felsic rock, which is created by decompression melting. |
| Volcanism at divergent boundaries is most often associated with basaltic rock, which is created by heating of the crust. |
| Volcanism at divergent boundaries is most often associated with basaltic rock, which is created by water lowering the melting temperature of mantle rock. |
| Volcanism at divergent boundaries is most often associated with basaltic rock, which is created by decompression melting. |
| Volcanism at divergent boundaries is most often associated with felsic rock, which is created by water lowering the melting temperature of mantle rock. |
3.
Part A - Choose the answer that does not belong with the others.
| Shields |
| Lapilli |
| Bombs |
| Pahoehoe |
| Gases |
4.
Select the answer that doesn't belong with the others.
| Lapilli |
| Basalt plateau |
| Caldera |
| Volcanic neck |
| Lava dome |
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