Volcanoes: Structure, Caldera Formation, and Characteristics
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1.
Volcanoes contain a
vent, crater and slopes.
2.
A vent is an opening in
the crusts surface in
which lava is emitted.
3.
A crater is connected to
the magma chamber
that is located near the
vent.
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A caldera is
sometimes
confused with a
crater.
2.
They differ in size.
3.
A caldera is around
50 km in diameter,
while a crater is at
most 1 km in
diameter.
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1.
A caldera is formed
when the slopes of
a volcano collapse.
2.
The top of the
magma chamber
becomes empty
from lava flow.
3.
The caldera then
fills up with water
forming a lake.
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Volcanoes are geological formations with vents, craters, and slopes. The structure of a volcano includes a vent for lava emission and a crater connected to a magma chamber. Understanding the difference between a caldera and a crater is crucial - calderas are much larger, around 50 km in diameter, formed by the collapse of volcano slopes, while craters are smaller, typically less than 1 km. Calderas get filled with water to create lakes. Explore more about volcanoes' main features and caldera formation from this informative presentation.
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Presentation Transcript
Main Idea: Volcanoes Main Idea: Volcanoes
A. Structure of volcano A. Structure of volcano 1. Volcanoes contain a vent, crater and slopes. A vent is an opening in the crusts surface in which lava is emitted. A crater is connected to the magma chamber that is located near the vent. 2. 3.
B. What is a caldera? B. What is a caldera? 1. A caldera is sometimes confused with a crater. 2. They differ in size. 3. A caldera is around 50 km in diameter, while a crater is at most 1 km in diameter.
C. How is a caldera C. How is a caldera formed? formed? 1. A caldera is formed when the slopes of a volcano collapse. 2. The top of the magma chamber becomes empty from lava flow. 3. The caldera then fills up with water forming a lake.
This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.
