Quiz - Dynamic Planet
unifromitarianism
all systems functions the same as they were in the past
subduction occurs
along collision zones between continental and oceanic plates
new ocean crust is being formed
along rift zones
Mohorovicic discontinuity (Moho)
boundary between crust and mantle
what is the correct sequence of layers in Earth, from surface to center?
crust, asthenosphere, lower mantle, core
plate boundaries are associated with
earthquakes, rifting, volcanoes, and subduction
Alfred Wegner's theory of continental drift was immediately accepted by the scientific community
false
earthquake and volcanic occurrences do not correlate well with crustal plate boundaries
false
A batholith forms from
intrusive igneous rock
Which of the following gives the correct sequence of layers in the mantle, from center to surface?
lower mantle, upper mantle, asthenosphere
Question #10
magma - lava sandstone NOT igneous basalt NOT sedimentary granite NOT metamorphic
which layer of the planet forms 80 percent of Earth's total volume, and has an average density of 4.5 grams per square cm?
mantle
which of the following is not a sedimentary rock?
marble
The asthenosphere can best be described as
plastic-like
the history of life on earth is chronicled in which type of rock?
sedimentary
isostasy
the balance between the buoyancy and gravitational forces
The major rocks of Earth's crust are classified into principal types based on
the manner in which they formed
the ocean floor subjects under continents because
the ocean floor is made of mafic material and is therefore more dense than continental material
continental crust is basically ______, whereas oceanic crust is basically ______
thin; thick
The deepest places in the ocean are those in which rifting occurs
true
The geologic cycle is powered both by exogenic and endogenic energy systems
true
which of the following is exogenic in nature?
weathering
What percent of Earth's crust is composed of only eight natural elements?
99%