1.

How is magma generated along convergent plate boundaries?

Friction from the subducting plate raises the temperature ofthe rock under which it subducts, melting this rock intomagma.

The subducting plate pushes mantle rock upwards, where itreaches the surface through the trench.

The subducting plate drives water and carbon dioxide into themantle, which reduces the temperature at which it melts, allowingmantle rock to melt and rise.

The collision of two continental plates create enough heat tomelt rock, thus producing magma.

The subducting plate pushes mantle rock upwards, whichdecompresses as it rises. This decompression allows the mantle rockto melt.

2.

Volcanism at divergent plate boundaries is most often associatedwith which rock type, and what causes rocks to melt in thesesettings?

Volcanism at divergent boundaries is most often associated withfelsic rock, which is created by decompression melting.

Volcanism at divergent boundaries is most often associated withbasaltic rock, which is created by heating of the crust.

Volcanism at divergent boundaries is most often associated withbasaltic rock, which is created by water lowering the meltingtemperature of mantle rock.

Volcanism at divergent boundaries is most often associated withbasaltic rock, which is created by decompression melting.

Volcanism at divergent boundaries is most often associated withfelsic rock, which is created by water lowering the meltingtemperature of mantle rock.

3.

Part A - Choose the answer that does not belong with theothers.

Shields

Lapilli

Bombs

Pahoehoe

Gases

4.

Select the answer that doesn't belong with the others.

Lapilli

Basalt plateau

Caldera

Volcanic neck

Lava dome