Plate Tectonics
What is the theory of Pangea?
All the contents on Earth were one huge super continent.
How many main types of volcanos types are there?
4 main types.
How much of the Earths surface does the ocean cover?
71%
What causes continental drifts?
Moving of the seafloor.
The crust is broken up into big "puzzle" pieces, what are these pieces called.
Tectonic plates
What does the movement of plate tectonics create?
Land forms (such as mountains, volcanos, earthquakes, trenches).
What are the 4 main types of volcanos?
Cinder cones, composite volcanos, shield volcanos, lava volcano.
Deepest Trench in the ocean?
Mariana Trench.
What does The continental drift suggest about the past?
That the continents were once all connected (Pangea)
What are the four layers of Earth?
Inner core, Outer core, Mantle, and Crust
What are the three types of plate boundaries?
Divergent, convergent, transform boundaries.
How hot is volcanic lava?
2,200 degrees Fahrenheit.
What % of marine animals live in the first layer of the ocean? (Epipelagic zone)
90%
How long ago did Pangea exist?
roughly 300million years ago.
What is the thickest layer of Earth?
The Mantle.
Where do most earthquakes and volcanic activity occur?
Above plate boundaries.
How big is the danger zone around a volcano?
A 20 mile radius.
What are the nicknames for all the ocean layers?
The sunlight zone, The twilight zone, The midnight zone, The abyssal zone, The trenchs.
What is one piece of evidence that supports the theory of Pangea?
The fit of the continents, the distribution of ancient fossils, rocks, and mountain ranges.
What is the deepest humans have even dug?
BONUS!!! DOUBLE POINTS!!!- how log did it take?
12 kilometers (7.6 miles)
20 YEARS!!!
What is the Wilson cycle?
The Wilson Cycle explains the process of the opening and closing of an ocean and rift valleys.
How many active volcanos are on Earth?
About 1,500 active volcanos.
How does the bathypelagic zone get light?
From bioluminescence from the animals themselves.
When did the speculations that the continents might have drifted apart first begin spreading?
1912, Alfred Wegener.
What is the Inner Core mostly composed of?
Iron and nickel.