Question

Lava with a higher content of _______ has higher viscosity. If a large explosion causes the magma chamber below a volcano to empty, the volcano can collapse and form a/an _______. Shield volcanoes can form when less _______ lava flows quickly away from a vent. Respond to the following based on your reading. Briefly describe what causes a volcanic eruption to be explosive.

Answer 1

1) Silica

2) Caldera

3) Viscous

Step-by-step explanation:

Answer 2

1. silica

2. caldera

3. viscous

4. 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.

Step-by-step explanation: