Volcanoes

    Which characteristic of magma mainly describe its ability to resist flowing

• color

• viscosity

• temperature

• silica content

What would magma with the highest viscosity contain?

• a high silica content and high temperature

• a high silica content and low temperature

• a low silica content and high temperature

• a low silica content and low temperature

Magma which is forced onto Earth’s surface is known as _________.

• vent

• lava

• cone

• magma chamber

   It is a steam driven eruption as the hot rocks come in contact with water.

• phreatic

• strombolian

• phreatomagmatic

• vulcanian

  It a periodic weak to violent eruption characterized by fountain lava.

• phreatic

• strombolian

• phreatomagmatic

• vulcanian

Describe the rate of flow of lava that has a high amount of dissolved gases

• fast

• slow

• moderate

• cannot be determined

Describe the viscosity of lava that flows very slow

• low

• high

• moderate

• cannot be determined

Volcanoes that haven't erupted in historic times are known as___

• active

• extint

• dormant

• instinct

  The type of volcano which has a perfect cone shape and is also  known as stratovolcano

• cinder

• lava dome

• shield

• composite

Which among the following volcanoes is formed from cinder and ash?

• cinder

• composite

• shield

• dormant