Question

Fill in the blank.

Answer 1

silica

caldera

viscous

denser

subduction

divergence

hot spots

earthquakes

Explosions from composite volcanoes occur as a result of gas buildup within them. Shield volcanoes also may erupt explosively if water accumulates inside their vents.

Answer 2

Answer:

1. lava with a higher content of silica has higher viscosity
2. The volcano can collapse and form a caldera
3. shield volcanoes can form when less viscous lava flows quickly away from a vent
4. During an oceanic plate convergence, the denser plate will sink
5. The west coast of the united state has features formed by subduction
6. During the divergence of two tectonic plates, magma wills the space between two tectonic plates
7. The only volcanic activity that is not formed at tectonic plate boundaries is hot spots and volcanoes are linked severe weather events

    The response to all these is earthquakes

9. An explosive eruption is a very violent type of volcanic eruption and can be caused when enough gas has dissolved under pressure in a viscous magma in a way that when the lava is expelled it froths into volcanic ash when pressure is low at its vent

Explanation:

An explosive eruption is a very violent type of volcanic eruption and can be caused when enough gas has dissolved under pressure in a viscous magma in a way that when the lava is expelled it froths into volcanic ash when pressure is low at its vent