27. what are the factors in how violently or quietly a volcano erupts?\n28. as the temperature of lava…

27. what are the factors in how violently or quietly a volcano erupts?\n28. as the temperature of lava increases, what happens to its viscosity?\n29. structures that form from the cooling and hardening of magma beneath earths surface are\n30. the particles produced in volcanic eruptions are called\n31. most shield volcanoes have grown from the ocean floor to form what

27. what are the factors in how violently or quietly a volcano erupts?\n28. as the temperature of lava increases, what happens to its viscosity?\n29. structures that form from the cooling and hardening of magma beneath earths surface are\n30. the particles produced in volcanic eruptions are called\n31. most shield volcanoes have grown from the ocean floor to form what

Answer

Brief Explanations:

  1. Factors include magma composition, gas content, and pressure. High - silica magma and high gas content lead to violent eruptions; low - silica magma and low gas content lead to quiet eruptions.
  2. As lava temperature decreases and viscosity increases, lava flows more slowly and may form thicker, more blocky structures.
  3. Structures formed from the cooling and hardening of magma beneath Earth's surface are called plutons.
  4. Volcanic eruptions that produce particles are called explosive eruptions.
  5. Shield volcanoes have grown from the ocean floor through repeated non - explosive eruptions of low - viscosity lava.

Answer:

  1. Magma composition, gas content, pressure.
  2. Lava flows more slowly, may form thicker, blocky structures.
  3. Plutons.
  4. Explosive eruptions.
  5. Repeated non - explosive eruptions of low - viscosity lava.