10 Questions
How do volcanoes primarily form?
By magma rising from Earth's mantle to the surface through a conduit
What type of lava has high silica content and leads to explosive eruptions?
Felsic lava
Where do most volcanoes form along plate boundaries?
At divergent boundaries
What is the main component responsible for forming the foundation of a volcano?
Magma
Which type of lava is characterized by having lower silica content and causing nonexplosive eruptions?
Mafic lava
What type of lava is produced at convergent boundaries?
Silica-rich lava
Which type of plate convergence results in lower silica content in the lava?
Oceanic-oceanic
What geological feature is formed when tectonic plates move over hot spots under oceanic crust?
Volcanic islands
Where do hot spots originate from?
Mantle-core boundary
What is the main reason for explosive eruptions at convergent boundaries?
Rich in silica magma
Learn about the formation and structure of volcanoes, which are mountain-like structures formed around fissures in the Earth's crust where magma erupts onto the surface as lava. Discover how volcanoes can form on land, under the ocean, or in the center of islands.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
