1)identify and describe the two primary factors that determine whether a volcanic eruption is relatively violent or not, and how these factors relate to the viscosity of a magma. 2)identify and describe the threats posed by volcanoes, other than lava flows.3) name the three main types of volcanoes and describe how they are different (size, shape, eruption violence)

1. crust 1 the metallic layer at the earth's center 2. inner core 3 the firm layer between the crust and the asthenosphere 3. lower mantle 2 the layer surrounding the inner core 4. asthenosphere 4 the semi-solid layer between the top layer and the upper mantle 5. upper mantle 5 the layer between the asthenosphere and lower mantle 6. top layer 6 the earth's outermost layer 7. outer core 7 the hottest part of the mantle

Which statements describe characteristics of mdcs? higher standard of living increased agricultural focus more access to health care more access to transportation and communication more industry reduced educational opportunities shorter life expectancy

What is the thickest layer of earth called?