25.3 and 25.4 Flashcards
(31 cards)
What is the boundary that mark a density change between layers?
Discontinuity
Discontinuity can be identified?
Seismic waves
What is a Shadow Zone?
Where no seismic waves been recorded
What is another name for Shadow Zone?
Dead Zone
What are the degrees from an epicenter that shadow zones fall?
105 and 140
Is the outer core a solid or liquid?
liquid
Is the inner core a solid or liquid?
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 fluids resistance to flowing.
Viscosity
Chemical compound, silica dioxide, a common ingredient in most magma and much of earths crust.
Silica
Small steep-sloped volcano with a short eruption cycle, composed of cinder, formed at vent in earths crust often around the central vent of a larger volcano.
Cinder Cone Volcano
Large, broad, flat volcano composed of layer upon layer of basaltic lava flows.
Shield volcano
Large and steep-sided volcano composed of layered 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 zone?
volcano
Which two specific locations can volcanic activity occur do to divergence?
Mid-Atlantic Ridge and East African Rift Valley
Are hot spots stationary?
No they are in a set location
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
