Chapter 22: Plate Tectonics
_________ found in the Atlantic Ocean between North America and Europe is composed of dense and relatively young rock.
Seafloor crust
The lithosphere floats atop the...
asthenosphere.
Continental crust extends farther down into the mantle than oceanic crust because...
continental crust is thicker than oceanic crust.
Australia is composed of relatively old and thick...
continental crust.
Earth's layer with the most brittle behavior is the...
crust.
Divergent boundaries are areas of...
crustal formation.
The earthquakes that occur in Southern California generally occur above a...
fault.
The hypothesis of continental drift was supported by the jigsaw fit of the continents, similar _______.
fossils, matching rock types, and ancient ice sheets
Old Faithful Geyser at Yellowstone National Park in the United States acquires its energy from a...
hot spot.
The core of Earth is probably composed of...
iron and nickel.
The mantle is composed of...
iron-rich silicate rocks.
We can say that Earth's crust floats on the mantle because...
part of the mantle is hot enough to flow as a plastic solid.
The inner core is solid because...
pressure from the weight of the surrounding layers prevents the inner core from melting.
The slowly increasing distance between South America and Africa is due to...
seafloor spreading.
Layered _______ exposed by erosion can be seen when looking at the Grand Canyon in the United States.
sedimentary rock
The extremely deep ocean Marianas Trench is a result of...
subduction.
Isostasy is...
the positioning of the crust in response to the buoyant force and gravity.
The theory of plate tectonics states that the continents move because _______.
they are embedded within the drifting lithospheric plates
Regions in which earthquakes are common are also regions in which...
volcanoes are common.
