Question

I. OBJECTIVES

2. Explain how the type of magma affect the intensity of eruption and possible shape of volcano.
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Answer 1

Answer:

The chemical composition of magma affects its physical properties, which in turn have a major influence on the landform built by a volcanic eruption. ... As the silica content increases, these rock types generally become more viscous; as the magmatic gas content increases, they become more explosive.

Explanation:The volume of material released in any one eruption can vary enormously from a few cubic metres of magma to as much as 3,000 cubic km (720 cubic miles). A series of small eruptions usually builds up mounds close to the vent, whereas large-volume eruptions tend to disperse their products over a greater distance. Effusive eruptions form lava plateaus or gently sloping shield volcanoes; moderately explosive eruptions form stratovolcanoes; and giant explosive eruptions form plateaus of lava or ash flows and almost always form a caldera several kilometres in diameter over the eruption site. Naturally, since many other factors are involved in determining volcanic landforms, there are exceptions to these rules

Answer 2

Explanation:

1) something that you are trying to achieve; an aim

2) The chemical composition of magma affects its physical properties, which in turn have a major influence on the landform built by a volcanic eruption. ... As the silica content increases, these rock types generally become more viscous; as the magmatic gas content increases, they become more explosive.