Exam 2: Journey to the Center of the Earth

The lithosphere lies directly above the ________.

In the whole Earth,the four most common elements (by mass)are oxygen,silicon,magnesium,and ________.

The velocities of seismic waves traveling from earthquake foci ________.

Earth's magnetic field is generated by the ________.

The region of space that contains all of the material of our Solar System (shown below)is termed the ________.

If one were to ride a hot air balloon up into the atmosphere,one would experience the concentration of gases ________.

Earth's geothermal gradient is the rate of temperature change incurred by ________.

As compared to the asthenosphere,the lithosphere is ________.

If one were to see a comet passing by Earth,it is likely that this comet originated from ________.

The most common minerals within Earth are ________.

Presently,Earth's atmosphere is dominated by which two gases?

The Moho ________.

Of the three primary compositional layers of the Earth (crust,mantle,core),which is the thickest layer?

Glass is different from a mineral because it ________.

From left to right,correctly label each section of this slice of the Earth.Note that 1 starts at the surface of the Earth and 6 ends at the center of the Earth.

Hot,liquid rock beneath Earth's surface is termed ________.

Substances that can be transformed to a gas at relatively low temperatures are termed ________.

Which of the following statements about Earth's core is NOT true?

The densest layer of Earth is the ________.

As compared to the rocks that make up the crust,Earth as a whole is ________.