25.3 & 25.4 Flashcards
(30 cards)
What is the boundary that marks a density between layers?
Discontinuity
How can discontinuity be identified?
Seismic waves
What is a shadow zone?
Where no seismic waves been recorded
What is another name for a shadow zone?
Dead zone
What are the degrees from an epicenter that shadow zones fall?
Between 105 and 140
Is the outer core a solid or liquid?
Liquid
Is the inner core a solid or liquid? Why?
Solid due to the pressure
What is the lithosphere?
The crust and the upper most mantle
What is the asthenosphere?
A plastic like layer that the plates move on
What metallic materials make up the core?
Iron and nickel
What elements make up the mantle?
Calcium, Aluminum, Iron, And Magnesium
A fluid’s resistance to flowing.
Viscosity
Chemical compound, silica dioxide, a common ingredient in most magma and much of Earth’s crust.
Silica
Small steep-sloped volcano with a short eruption cycle, composed of cinder, formed at vents of Earth’s crusts, often around the central vent of a larger volcano.
Cinder Cone Volcano
Large, broad, flat volcano composed of layer upon layer of basaltic lava flow.
Shield Volcano
Large and steep-sided volcano composed of layers of lava and ash.
Composite Volcano
What is molten or liquid rocks stored inside Earth called?
Magma
Where is the ring of fire located?
In the Pacific Ocean
What forms when tectonic plates collide along subduction zones?
Volcanoes
Which two specific locations can volcanic activity occur do to divergence?
Mid-Atlantic Ridge & East African Rift Valley
Are hot spots stationary?
Yes, they are in a set location.
What are created from hot spots?
Volcanic Islands (Hawaii)
If a liquid has a higher viscosity is it going to run faster or slower?
Slower
If a magma has a higher viscosity does it have more or less silica?
More silica
