12 Questions
What feature distinguishes a CRATER from a CALDERA at the summit of a volcano?
Funnel-shaped opening
How are SHIELD VOLCANOES mainly formed?
By accumulation of lava
Which type of volcano is characterized by a steep slope, wide crater, and abundant cinders?
Cinder Cone Volcano
What defines an ACTIVE VOLCANO based on its record of eruption?
Eruption over the last 600 years
How do CINDER CONE VOLCANOES differ from SHIELD VOLCANOES?
Steep slope vs. domed structure
What leads to the formation of a CALDERA at the summit of a volcano?
Wall collapse post-explosive eruption
What type of volcano is formed from the alternating solidification of lava and pyroclastic deposits?
Composite cone or stratovolcano
What is the key characteristic of a fissure volcano?
It has giant cracks that open in the ground to expel lava
What is the term used to describe the mixture of rock, mineral, and glass particles expelled from a volcano during an eruption?
Pyroclastic materials
Which type of pyroclastic material refers to igneous rocks that formed during a volcanic eruption and were blown into the air?
Tephra
What is the term used to describe the fine particles of rock powder that are blown out from a volcano and can remain suspended in the atmosphere for long periods?
Volcanic dust
What type of volcanic eruption is dominated by the outpouring of lava onto the ground?
Effusive type of eruption
Learn about the different types of volcanic eruptions, such as explosive and calmer eruptions, as well as the various features of a volcano like summit, slope, and base. Understand the distinctions between a crater and a caldera at the summit of a volcano.
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