Plate tectonics1
What is slab pull😏😂
The gravitational force that occurs when a cold dense tectonic plate sinks into the Earth's mantle at a subduction zone and drags the rest of the plate behind it.
The newest crust in the Alantic Ocean forms along a mid ocean ridge.(true or false)
True
What are three pieces of information that support Alfred Wegener's theory, name ALL three.
*Continents fit like jigsaw puzzles
*Fossil evidence, similar fossils found on a separate continent.
*Rock structures
In which year was the origin of continents and oceans first published?
1915
What layer of earth do tectonic plates move on?
The asthenosphere
which boundary creates a new crust?
divergent boundaries
Why are earthquakes common along plate boundaries?
Moving tectonic plates catch on one another, buildd up intense friction and pressure, and suddenly snap.
How do scientists learn about the interior (center) of the earth?
Semitic waves
What drives plate movement?
Convection currents
When was the super-continent Pangea formed.
220 million years ago
how does seafloor spreading provide evidence that tectonic plates are moving.
The new oceanic crust continuously forms a mid ocean ridge and pushes the older crust outward.
How would Earth's continents look today if Pangaea had never broken apart?
If Pangaea never broke apart, Earth would have one massive continuous landmass surrounded by a global ocean.
If tectonic plates stopped moving, what would happen to Earth's surface over time.
The surface would flatten and lose the process that recycles life sustaining materials over million of years.
What geological feature is directly caused by the interactions of tectonic plates?
Mountains
What happens at convergent plate margins where tectonic plates are colliding?
Earthquakes occur
Hot spots can also cause volcanic activity. These develop because of a concentration of radioactive elements inside the mantle. Where do hotspots occur in a tectonic plate?
In the middle
The Earth's crust is divided into 7 major plates, which include all of the continents. Along which two plates do we see major earthquake activity?
Pacific and North / South America
Pacific and Eurasian/Indian
Plate tectonics is our current theory of how the movement of continental masses relates to the movement of ocean basins. This movement explains many phenomena, such as:
Earthquakes,volcanoes, weather patterns
Which specific layer of the Earth directly enables the movement of overlying tectonic plates through convection currents, and what is its physical mechanical behavior?
The asthenosphere
The San Andreas Fault in California is a prominent example of which type of plate boundary, and what is its primary characteristic?
Transform boundary, characterized by crustal blocks sliding horizontally past each other.
Among the primary forces driving tectonic plate motion, which force is generally considered the most dominant in pulling an oceanic plate downward at a convergent boundary?
Slab pull, caused by dense, cold sinking oceanic lithosphere pulling the plate behind.
The East African Rift system represents an early-stage example of which major tectonic phenomenon?
Continental rifting,a new divergent boundary that may eventually split the continent to form an ocean basin.
How do "slab pull" and "ridge push" drive plate motion?
Gravity pulls dense sinking plates down at subduction zones (slab pull) and pushes new crust away from high elevated mid-ocean ridges (ridge push).
Why does oceanic crust usually subduct beneath continental crust?
it is denser and heavier
How can a linear chain of volcanic islands, such as the Hawaiian archipelago, be used to reconstruct the historical movement of a tectonic plate?
The islands become older the further they are from the active hotspot.