Show:
Volcano Basics
Plate Tectonics and Volcanoes
Magma Properties
Volcanic Eruptions
Volcanic Hazards
100
A weak spot in the crust where molten material comes to the surface.
What is a volcano?
100
A long, undersea chain of volcanoes found at a divergent boundary.
What is a mid ocean ridge?
100
A physical property of liquids. The resistance of a liquid to flowing.
What is viscosity?
100
Two types of volcanic eruptions.
What are explosive and quiet?
100
The smallest piece of rock fragments released from an explosive volcano.
What is volcanic ash?
200
Lava that is underground.
What is magma?
200
The name for the process where one plate is pushed underneath another plate.
What is subduction?
200
Which liquid has higher viscosity: honey or peanut butter?
What is peanut butter?
200
Magma comes from which part of the earth?
What is the asthenosphere?
200
This rock has gas bubbles trapped in it and floats in water.
What is pumice?
300
A major volcanic belt found along the Pacific Ocean.
What is the Ring of Fire?
300
An area where material from deep in the mantle rises and melts, forming magma. Hawaii and Yellowstone were both formed in this way.
What is a hot spot?
300
Magma that is a higher temperature will have a (higher or lower) viscosity?
lower
300
This pushes magma to the surface.
What is dissolved gases in the magma.
300
This is the main volcanic hazard from a quiet volcano.
What is a lava flow?
400
Three types of Volcanoes
What are shield, composite, and cinder cone?
400
A chain of volcanoes that have been produced when two oceanic plates collide.
What is an island arc?
400
Magma with more silica will have a (higher or lower) viscosity?
Higher
400
A volcano erupts quietly if it has this kind of magma.
What is low silica, low viscosity magma?
400
A hot cloud of gases and ash released from a volcano.
What is a pyroclastic flow?
500
A landform that forms when a magma chamber empties and the roof of the chamber collapses.
What is a caldera?
500
The type of plate boundary that has the most explosive volcanoes.
What is a convergent boundary?
500
What is the cause of viscosity in liquids.
Friction between the particles in the liquid.
500
A volcano erupts explosively if it has this type of magma.
What is high silica, high viscosity magma?
500
A mixture of volcanic ash and water (usually melted snow).
What is a lahar?