The lava from Mount St. Helens is made up of rock that contains around 63 percent silica minerals. The lava from Kilauea is made up of rock that contains around 50 percent silica minerals. Based on this information and your observations in parts B through E, predict at least two factors that can affect the rate at which lava flows.
Some factors that can affect the rate at which lava flows are the steepness of the ground over which it travels, the rate of lava production at the vent and the type of lava erupted and its viscosity.
