25.3, 25.4 Flashcards
What is the boundary that marks a density between layers?
Discontinuity
How are discontinuity’s identified
Using seismic waves
What are shadow zones?
Areas where seismic waves aren’t recorded
Whats another name for shadow zone?
Dead zone
Between which degrees do shadow waves fall?
105°- 140°
Is the outer core a liquid or solid?
liquid
Is the inner core a solid or liquid? Why?
Solid because the pressure
What makes up the lithosphere?
Crust and upper most mantle
What is the asthenosphere?
Plastic like layer which earths plates move on.
Which elements make up the mantle.
Calcium, Aluminum, Iron and Magnesium
which elements make up the core?
Iron and Nickle
What is molten or liquid rock stored inside earth called?
magma
where is the ring of fire located?
pacific ocean
Which two specific locations have volcanic activity due to divergent plate boundaries?
East African rift
mid ocean ridge
Are hot spots stationary
Yes
What can hot spots create
Islands (The Hawaiian Islands)
If the is high viscosity will the fluid flow more quickly or slowly?
slow
if magma has a high viscosity will it contain more or less silica?
More
what is piroclastic marital?
Any solid material that erupts from a volcano
What is the smallest type of piroclastic material?
Volcanic ash
What is the largest type of piroclastic material?
volcanic bombs and blocks
what are the types of gases that erupt?
water vapor, carbon dioxide and sulfur dioxide
What is eruption style linked to?
Temperature and composition
How are volcano’s classified?
Size, shape and materials that erupt
What do cinder cones erupt?
high-temperature, gas-rich, basaltic lava
what are the tree types of volcano
Shield, cinder cone and composite
