1. Felsic magma is light-colored and has a high silica content. It is formed when continental crust melts. Felsic magma is typically found in volcanoes that erupt explosively, producing ash and pumice.

2. Mafic magma is dark-colored and has a low silica content. It is formed when oceanic crust or mantle rock melts. Mafic magma is typically found in volcanoes that erupt quietly, producing lava flows.

The main difference between felsic and mafic magma is their silica content. Silica is a mineral that makes up a large part of the Earth's crust. Felsic magma has a high silica content because it is formed from continental crust, which is rich in silica. Mafic magma has a low silica content because it is formed from oceanic crust or mantle rock, which are both poor in silica.

The silica content of magma affects its viscosity. Viscosity is the resistance of a fluid to flow. Felsic magma is more viscous than mafic magma because it has a higher silica content. This means that felsic magma is less likely to flow easily and is more likely to erupt explosively. Mafic magma is less viscous than felsic magma because it has a lower silica content. This means that mafic magma is more likely to flow easily and is more likely to erupt quietly.

The type of magma that erupts from a volcano depends on the composition of the magma source. If the magma source is rich in silica, then felsic magma will erupt. If the magma source is poor in silica, then mafic magma will erupt.