Why would decompression of the mantle cause the production of mafic magma?
A) Mafic magma is produced at high pressures.
B) With less pressure comes higher melting points.
C) Mafic magma is produced at low pressure.
D) With less pressure comes lower melting points.
Question 2
Volcanoes are present at convergent plate boundaries because
A) the plates rub together, causing friction and heat.
B) water is carried down with the subducting plate and causes the mantle to melt.
C) heat from the inner mantle travels up along the subducting plate.
D) decompression melting due to decreased pressure at the boundary causes the mantle to melt and rise into volcano formations.
Block Diagram of Single-stage Pressure System for Dual-Stage Pressure Production of Nitric Acid
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Whole-Mantle Convection
Complete the following production chart and plot the points.