Scientist/ Misc
Theory of Seafloor Spreading
Who is Harry Hess?
Earth's crust is composed of separate plates that are always moving
What is the Theory of Plate Tectonics?
Boundary where plates collide.
What is convergent?
The solid layer made of oceanic and continental crust
What is the crust?
The hot, molten rock located above the Earth's surface.
What is lava?
Theory of Continental Drift
Who is Alfred Wegener?
Describes how continents move over the Earth's surface.
What is Continental Drift?
Boundary where plates separate from each other.
What is a divergent boundary?
Liquid layer of iron and nickel, 1300 miles thick.
What is the outer core?
The name of the scale that measures the strength of an earthquake?
What is Richter Scale?
When the shelf from the edge of the continent to the slope, and is formed by deposition. The slope is formed by erosion
What is the difference between the continental shelf and the continental slope?
Where a new seafloor forms.
What is the mid- ocean ridge?
When a denser plate gets down beneath another plate in the mantle.
What is subduction?
Convection currents occur here, and also composed of asthenosphere and lithosphere
What is the mantle?
This occurs when one tectonic plate moves under another.
what is a volcano?
Reason why an oceanic plate subducts under a continental plate
What is when a more dense plate, sinks under the less dense continental plate?
Three types of evidence that Wegener used to support his theory of Continental Drift?
What are 1) fossils, (2) Rocks, (3) Climate changes?
Boundary where plates slide past each other.
What is transform boundary?
Layer made of iron and nickel and 750 miles thick.
What is the inner core?
Where do most geological events like volcanoes and Earthquakes occur?
What is plate boundaries?
As you go from the Earth's crust to the core this happens to temperature, density, pressure.
What is increase in temperature, density, and pressure as depth increases?
Process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity, then gradually moves away from the ridge.
What is Seafloor Spreading?
Boundary where a new seafloor is formed.
What is a divergent boundary?
Layer of the Earth made of tectonics plate.
What is lithosphere?
The main cause of Earthquakes and Volcanoes?
What is plate tectonics?