Answer:
the bold text are the answers
Explanation:
Volcanologist study volcanoes
Volcanoes are classified as active and inactive
Inactive does not show volcanic activity while active show volcanic activity
Volcanoes expel magma to earth surface
Magma contains dissolved substances and molten rocks
Volcanoes have three external parts the summit, slope, and base
Summit contains opening that could be either crater or caldera
Volcanoes classified according to volcanic cones such as shield, cinder, stratovolcano
Stratovolcano also known as composite
