Seismic Waves
This type of wave cannot travel through liquids and disappears at about 2900 km depth, creating a S-wave shadow zone
S-wave
The layer where S-waves vanish and P-waves slow is called the _________.
The outer core
The process where new oceanic crust forms at a mid-ocean ridge as plates move apart is called______?
Seafloor Spreading
Fossils of Mesosaurus and Cynognathus found on both South American and Africa support which theory about continents?
Continental Drift/ the continents were once joined together
Who lost/stole Mr. Jost's Piston Hall pass that has been a hall pass for 5 years?
... IYKYK
These waves are faster and can travel through both solid and liquid layers; the graph shows their speed drops sharply near 2900km
P-waves aka primary waves
At about 5200 km depth P-wave speeds increase sharply, indicating entry into the _______
Inner core (P-wave speeds increase entering the solid inner core) at about 5200km
During convection currents molten rock heats and becomes less _____ and moves _____
dense, up or towards the surface.
The presence of Glossopteris fossils across South America, Africa, India, Antarctica, and Australia provides evidence that these continents were once _______.
Connected (joined) forming one large super continent known as Pangea
Which football team one the college football national championship?
Indiana
On most charts, S-waves drop to at 2900km. What does this tell scientists about the layer at that depth? (answer with "This layer must be a ________")
This layer must be a liquid.
Based on P- and S-wave velocities vs. depth, what does the sudden decrease in P-wave speed and disappearance of S-waves at 2900 km reveal about composition/state? (Short explanation)
It indicates a transition from solid mantle to a liquid outer core at 2900 km because S-waves cannot travel through liquids and P-waves slow due to density/compositional change.
What type of plate boundary is the Mid-Atlantic Ridge?
Divergent (spreading apart)
Coal in West Virginia formed from tropical plants, how did this happen?
Millions of years ago West Virginia was closer to the equator; plate motion moved it to its present location.
What is Mr. Jost's Classroom number
305
On the Earthquake P-wave and S-wave Travel Time graph. An earthquake 4,000 km from the epicenter. How long did it take the P-wave to get there?
7 minutes
What is the composition of the matle
Similar to clay or playdough
Why do mountains form at some convergent boundaries while trenches form at others
When (continental-continental) plates combine mountains are formed, When (oceanic-continental) collide the oceanic crust goes under (subduction zone) the continental crust it creates trenches.
What part of the planet has the most volcanoes
The ring or fire
What size wheels come stock on a 2023 Ram 1500
18 inch
On the Earthquake P-wave and S-wave Travel Time graph. A senor in New Mexico was 6,000 km from the epicenter, how long did it take the S-Wave to reach the sensor?
17 minutes
Explain how P-wave refraction (bending) through Earth helps scientists determine density and thickness of internal layers
P-wave refraction (bending) occurs because wave speed changes with density/composition; by measuring travel times and angles, scientists infer layer thicknesses and densities.
What is the largest Techtronic Plate
The Pacific Plate
What is the hand signals for Transform boundaries
...
How many time zones are in Russia
11