Chapter 25.3 and 25.4 AAAAAAAAHHHHHHHHHH Flashcards
What is the boundary that marks the density change between layers.
discontinuity
How are discontinuity identified
By using seismic waves
What is a shadow zone
an area that have no seismic wave recorded.
What is another term for shadow zone
dead zone HAH
What are the degrees that the shadow zone fall in between
105 and 140 degrees
Is the outer core a solid or a liquid
Its a liquid
Is the inner core a solid or a liquid. Why?
Solid. Because of pressure
What makes up the lithosphere?
The crust and the uppermost mantle
What is the asthenospheres
A plastic-like layer which earths plates move on
What element make up the mantle.
Calcium, Aluminum, Iron. Magnesium
Which elements make up the core
Iron and Nickle.
is a measure of a fluid, such as lava
resistance to flow
Viscosity
is the chemical compounds silicon dioxide SIO2, which is the common ingredient in magma.
Silica
Cinder cone volcanoes
tend to be small, have heights in the hundreds of meter ranges, and have short eruption cycles
are broad, flat structures composed of layer upon layers of magma
Shield volcanoes
are built from particles and blobs of congealed lava ejected from a single vent. As the gas-charged lava is blown violently into the air, it breaks into small fragments that solidify and fall as cinders around the vent to form a circular or oval cone.
Cinder-cone Volcanoes
what is molten or liquid rock called stored inside earth called
magma
where is the ring of fire located
The Pacific Ocean
What forms when tectonic plates collide along the subduction zone
Volcanoes
What two specific location have volcanic activity due to divergent
- Mid Atlantic Ridge
2. East African Rift Valley
Are hot spots stationary
Yes, They stay in there spot
What are created by hot spots
Islands (Hawaiian islands)
If a viscosity is higher, is it going to flow faster or slower
If its higher its going to flow slower
If a viscosity is higher, is it going to flow faster or slower
If its higher its going to flow slower
If magma has a high viscosity, is it going to have more or less silica.
Magma with have more
What is Pyroclastic Material
It is a solid material that erupts from a volcanoes
What is the smallest type of pyroclastic material
Volcanic ash
What is the smallest type of pyroclastic material
Volcanic ash
What is the biggest type of pyroclastic material
Blocks and Bombs
What are the gasses that come from volcanoes
water vapor, carbon dioxide, and sulfur dioxide
how are volcanoes classified
By there size, shape, and the materials that erupt from them
What are the three types of volcanos
Shield, Cinder-cone, Composite
