Chapter 25.3 and 25.4 Flashcards
What is the boundary that marks the density change between layers??
Discontinuity
How can discontinuity´s be identified???
Seismic waves
What are Shadow Zones?????
Areas where no seismic waves are recorded.
What is another term for shadow zones??????
Dead zone
Which two degrees does shadow zones fall between?????
105 and 140 degrees
Is the outer core a solid or a liquid???????
Liquid
Is the inner core a solid or a liquid???
The inner core is a solid because of pressure
What makes up the lithosphere????
The crust and the upper most mantle.
What is the asthenoshpere?
Plastic-like layer which earths plates move on.
Which elements make up the mantle?????
Calcium, Aluminum, Iron, and Magnesium
What elements make up the core????
Iron and Nickel
What is the measurement of a fluid´s resistance to flow??
Viscosity
What is the chemical compound for silicon dioxide???
Silica
What have short eruption cycles?????
Cinder Cone Volcanoes
What are flat structures composed of a layer upon layer of lava flows?????
Shield Volcanoes
What is large and steep-sided?????
Composite Volcanoes
What is molten, or liquid rock stored inside earth?
Magma
Were is the fire located?????
Pacific Ocean
What is created when tectonic plates collide along the subduction zone?????
Volcanoes
What are two specific examples of volcanic activity due to divergents????
Mid Atlantic Ridge And East African Ridge
Are hot spots stationary???
yuh
What can by created in hot spots???
Islands (Hawaii)
If a liquid has a higher viscosity will it flow more quickly or slowly????
Slowly
If magma has high viscosity will it contain more or less silica????
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