The answer is False.
The reason for eruption of volcanoes are density and pressure. The density of magma is lower as compared to the density of the surrounding rocks which makes it rise like air bubbles in dense syrup like substance. The height upto which the volcano will rise is determined by the density of the magma and the weight of rocks which is above the magma. As the magma rises the gasses dissolved in it starts to form bubbles. The bubbles of gas exert pressure and the eruption of volcanoes takes place.
The correct answer is - a) viscosity, gas content, and silica content.
The classification of the magma depends on its viscosity, gas content, and silica content. This are the three components that define the properties of the magma, as well as its behavior, and the types of rocks that will form from it after it cools off when it comes out of the volcano. The eruption of the volcano is also heavily dependent on the composition of the magma, so the different types of eruptions that can be witnessed at the volcanoes, are all defined by the magma composition.
The given statement is false.
As it is the dissolved gases, not the dissolved minerals, which are trapped in magma under tremendous pressure that provide the force for a volcanic eruption. The magma comprises dissolved gases that offers the driving force, which makes the majority of volcanic eruptions.
As magma reaches towards the surface and the pressure reduces, the gases get discharged from the liquid part of the magma and continue to move upward and finally get discharged into the atmosphere.
viscosity, gas content, and silica content.
answer; /// i believe that the correct answer is (50%);
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