chpter 25.3 and 25.4 Flashcards
Tend to be small, have heights in the hundreds of meters range, and have short eruption cycles.
Cinder Cone Volcanoes
Shield volcanoes are broad, flat structures composed of layer upon layer of lava flows.
Shield volcanoes
Viscosity is the measure of a fluid´s resistance to flow
Viscosity
Silica is the chemical compound silicon dioxide, SiO2, which is a common ingredient in most magma.
Silica
Composite volcanoes are large and steep-sided, often
thousands of meters high and tens of kilometers across
the base, and composed of layers of both lava and ash.
Composite volcanoes
Molten, or liquid, rocks stored inside earth?
Magma
Where is the Ring of Fire located?
the Pacific ocean
What is created where tectonic plates collide along subduction zones?
Volcanoes
what are two specific examples of volcanic activity due to divergence?
Mid Atlantic ridge, East African Rift
Are hot spots stationary?
Yes
What can be created by hot spots?
Islands ¨Hawaii¨
If a liquid has a higher viscosity will it flow more quickly or more slowly?
Slowly
if magma has high viscosity will it contain more or less silica?
More
what is pyroclastic material?
Any solid material that erupts from a volcano
what is the smallest pyroclastic material?
Volcanic ash
