Plate tectonics
1: How many earthquakes occur every year around the world?
about 2000 earthquakes happen every year
2: What is the Tectonics Theory? Explain.
the tectonic theory is that the surface of the earth is not fixed and eternal, but is in constant, ever-changing motion.
3: Where do the Tectonic forces originate?
they originate deep within the planet
4: What are Earth’s 3 main layers?
central core, thick mantel, and very thin outer crust
5: Where is Tectonic activity concentrated?
is concentrated in the upper 700 kilometers of the planet
6: What is the Lithosphere? Where is it located?
the lithosphere is the rigid outer part of the earth, consisting of the crust and upper mantle, and is located 100 kilometers inside earth
7: What is the Asthenosphere? Why is it important to plate tectonics?
the asthenosphere is the soft of the upper mantle, its important to plate tectonics because it lets heavier plates fall on top of it
8: How fast do plates move (average?)
plates move about a few centimeters each year
9: What are the 3 types of plate boundaries?
the three types of plates are divergent, convergent, and transform plate boundaries.
10: What happens at Divergent Boundaries? Where are these mostly located?
Magma float through cracks in the ocean floor and creates new crust as well as basalt, and are located at the bottom of the ocean
11: What kind of rock is Oceanic Crust made of?
Oceanic crust is usually made of mafic rock or sima.
12: What happens at Convergent Boundaries? What is often formed? Explain.
One of the plates on the boundary will be forced under the other. This causes a deepening of the ocean along the boundary, and a trench will form
13: What is Granite? Where is it found?
Granite is a hard igneous rock, kind of crystalized, it is found usually in the continental plates of the earth
14: What happens at Transform Boundaries? What is special about transform boundaries
That's where two plates grind past each other with no (or little) compression or tension
about 2000 earthquakes happen every year
2: What is the Tectonics Theory? Explain.
the tectonic theory is that the surface of the earth is not fixed and eternal, but is in constant, ever-changing motion.
3: Where do the Tectonic forces originate?
they originate deep within the planet
4: What are Earth’s 3 main layers?
central core, thick mantel, and very thin outer crust
5: Where is Tectonic activity concentrated?
is concentrated in the upper 700 kilometers of the planet
6: What is the Lithosphere? Where is it located?
the lithosphere is the rigid outer part of the earth, consisting of the crust and upper mantle, and is located 100 kilometers inside earth
7: What is the Asthenosphere? Why is it important to plate tectonics?
the asthenosphere is the soft of the upper mantle, its important to plate tectonics because it lets heavier plates fall on top of it
8: How fast do plates move (average?)
plates move about a few centimeters each year
9: What are the 3 types of plate boundaries?
the three types of plates are divergent, convergent, and transform plate boundaries.
10: What happens at Divergent Boundaries? Where are these mostly located?
Magma float through cracks in the ocean floor and creates new crust as well as basalt, and are located at the bottom of the ocean
11: What kind of rock is Oceanic Crust made of?
Oceanic crust is usually made of mafic rock or sima.
12: What happens at Convergent Boundaries? What is often formed? Explain.
One of the plates on the boundary will be forced under the other. This causes a deepening of the ocean along the boundary, and a trench will form
13: What is Granite? Where is it found?
Granite is a hard igneous rock, kind of crystalized, it is found usually in the continental plates of the earth
14: What happens at Transform Boundaries? What is special about transform boundaries
That's where two plates grind past each other with no (or little) compression or tension