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%