Week 2 quiz - Gravity, heat and magnetism Flashcards
As compared to the rocks that make up the crust, earth as whole is:
Considerably more dense
The geotherm is the rate of change of ________.
temperature with depth in Earth’s interior
There are many ways in which uplift can occur, but all of them reflect ________.
the lithosphere’s tendency to achieve isostasy
The densest layer of Earth is the ________.
inner core
Under which of these conditions would a body of rock be more likely to exhibit plastic behavior?
high temperature
Which of the following statements about Earth’s core is NOT true?
By volume, it is the largest compositional layer of the Earth.
The Moho ________.
is found deeper underneath continents than under oceans
In general, the mantle is made of the rock ________ and has a(n) ________ composition.
peridotite; ultramafic
Correctly name each section of the Earth, starting at the surface of the Earth and ending at the centre of the Earth.
crust, upper mantle, transition zone, lower mantle, liquid outer core, solid inner core
Which layer of the Earth has the highest density?
inner core
The core consists of two layers: the ________ inner core and ________ outer core.
The outer core is liquid - gives us our large shadow zone; the inner core is solid - allowing types of P-waves to appear at high epicentral distance. Both inner and outer core contain an iron-nickel alloy.
The balance between the weight of a mountain range and the buoyancy provided by the underlying mantle is termed ________.
Isostatic equilibrium
