Miscellaneous Flashcards
The primary evidence that our Sun is a third-, fourth-, or fifth-generation star comes from the fact
that our ________.
Solar system contains way too many heavy atoms to be first generation
Which of the following bodies is the smallest
planetesimal
Volatiles refer to substances that
evaporates in gas
The shape of Earth’s magnetic field is approximately that of a
dipole
Two atoms of a single element that differ in number of neutrons are said to represent two distinct ________ of that element.
isotopes
Compared to oceanic crust, continental crust is
thicker
The internal ordering of mineral crystals can be detected using
XRD
Natural glass is NOT considered a mineral because it ________.
is organic
Cleavage in minerals refers to ________.
a tendency to break along planes of weakness
With regard to minerals, hardness refers to the ability to resist ________.
being scratched
Minerals are all naturally occurring solid substances with a definable chemical composition. They must also possess ________.
a fixed crystalline structure (spatial arrangement of atoms and ions)
Trace amounts of impurity can produce significant differences in ________ among individual crystals of a mineral species.
color
Wegener’s proposal that the continents had once fit together as a single supercontinent was rejected by geologists at the time because ________.
Wegener could not provide a driving force
The San Andreas Fault zone in California is an example of a ________ plate boundary.
transform
Most of the pushing force driving plate motion is produced ________.
at mid ocean ridges
