Earth's Interior/ Dynamic crust
The theory of continental drift suggests that the....
Present-day continents of South America and Africa once fit together like puzzle parts.
The rock between 2,900 kilometers and 5,200 kilometers below the Earth's surface is inferred to be....
An iron-rich liquid.
Which part of Earth's interior is inferred to have convection currents that cause tectonic plates to move?
Asthenosphere.
The observed difference in density between continental crust and oceanic crust is most likely due to differences in their...
Composition.
The motion of the convection currents in the mantle beneath the Atlantic Ocean appears to be mainly making this ocean basin (floor)...
Wider.
The pressure at the boundary between the mantle and the outer core of Earth is inferred to be approximately...
1.4 million atmospheres.
What is Earth's inferred interior pressure in millions of atmospheres, at a depth of 3,500 kilometers?
1.9 million of atmospheres.
Which combination of temperature and pressure is inferred to occur within Earth's stiffer mantle?
3,500 degrees C and 0.4 million atmospheres.
What is the inferred temperature at the boundary between Earth's stiffer mantle and outer core?
5,000 degrees C.
The temperature at the center of the Earth is estimated to be....
6,800 K.
As depth into Earth's interior increases the...
Density, Temperature, and Pressure all increase.
Mid- ocean ridges (rifts) normally form where tectonics plates are.....
Diverging.
Scientists have classified Earth's interior into the zones shown based primarily on evidence gained by studying....
Earthquake seismic waves.
The occurrence of high-heat floors at the ridge center provides evidence of the...
Existence of rising mantle convection currents.
As distance from the center of the ridge increases the age of the rocks...
Increases.
What is Earth's core made out of...
Iron and Nickel.
The basaltic bedrock of the oceanic crust is classified as...
Mafic, with a density of 3.0 g/cm cubed
In the Earth's interior, which zone has a temperature higher than it's melting point?
Outer Core.
At which plate boundary is one lithospheric plate sliding under another...
Pacific plate and Indian-Australian Plate.
Which statement best supports the theory that all the continents were once a single landmass?
Rock and fossil correlation can be made where the continents were once a single landmass?
Which feature is located at 40 degrees North latitude and 120 degrees West longitude...
San Andreas Fault.
Which observation about the Mid-Atlantic Ridge region provides best evidence that the seafloor has been spreading for millions of years?
Seafloor bedrock is younger near the ridge and older farther away.
The deep trench along the west coast of South America is caused by movement of the oceanic crust that is....
Sinking beneath the continental crust.
Compared to Earth's oceanic crust, Earth's continental crust is....
Thicker and composed of granite.
Compared to Earth's continental crust, Earth's oceanic crust is...
Thinner and more dense.
Where is the thickest part of the Earth's crust?
Under continental mountain ranges.
